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Top 10 Convict Cichlid Tank Mates 2027

📖 2,376 words🗓️ Published Jul 22, 2026

Direct Answer

The best tank mates for convict cichlids in 2027 are robust, fast-moving fish that can handle the convict's territorial aggression—top choices include Silver Dollar Fish, Bristlenose Pleco, and Tinfoil Barbs, all of which thrive in the warm, hard water convicts prefer while avoiding confrontations in the middle and lower tank zones.

Why Convict Cichlid Aggression Dictates Tank Mate Selection

Convict cichlids (*Amatitlania nigrofasciata*) are among the most aggressive freshwater fish relative to their size. A breeding pair will defend a territory with ferocity that can kill fish three times their length. This aggression is not random—it is driven by spawning cycles, tank size, and the availability of hiding spots. A 40-gallon breeder tank (36 x 18 inches) is the minimum for a single pair, while a 55-gallon or larger allows for a community setup. The key behavioral rule: any tank mate must be fast enough to escape a chase, large enough to not be swallowed (over 2 inches), and thick-bodied enough to withstand a nip. Fish with long fins, slow swimming, or timid personalities—such as angelfish or guppies—are immediate casualties. The aggression peaks during spawning, which can occur every 3-4 weeks if conditions are stable. During these periods, even normally peaceful tank mates may be harassed. Providing multiple visual barriers—driftwood, rock piles, and dense planting—drops aggression by roughly 40% because convicts cannot maintain a full line of sight across the tank. Water parameters that reduce stress also help: temperature 78-82°F, pH 6.5-8.0, and hardness 10-20 dGH. When these conditions are met, convicts are less prone to constant aggression, and tank mates have a realistic chance of cohabiting.

Top Mid-Water Dither Fish: Silver Dollar Fish

Silver Dollar Fish (*Metynnis argenteus*) are the most effective dither fish for a convict cichlid tank. They reach 6 inches in diameter, school tightly, and occupy the open mid-to-top water column where convicts rarely patrol. A school of 4-6 Silver Dollars creates constant movement that signals safety to convicts, reducing the convicts' instinct to defend every inch of the tank. These fish are vegetarian—they need spirulina flakes, blanched spinach, and zucchini—so they do not compete for the high-protein cichlid pellets convicts eat. Their round, laterally compressed bodies make them difficult for a convict to grab or injure. Silver Dollars thrive in the same warm, hard water as convicts: 75-82°F, pH 6.5-7.5. The only trade-off is tank size—a 75-gallon tank is the minimum for a school, as they need horizontal swimming space. Cost is around $8-12 per fish from reputable online retailers like LiveAquaria or local specialty stores. They are hardy, rarely suffer from ich if quarantined, and live 8-10 years. For the keeper who wants a visible, active community that complements convicts without conflict, Silver Dollars are the top pick.

Bottom-Dwelling Cleanup Crew: Bristlenose Pleco

The Bristlenose Pleco (*Ancistrus cirrhosus*) is the only pleco that reliably coexists with convict cichlids. Unlike common plecos that grow to 18 inches and become territorial, Bristlenose Plecos max out at 4-5 inches. They are nocturnal algae grazers that spend daylight hours wedged under driftwood or in rock crevices—exactly where convicts cannot easily reach. Their armored body and spiny dorsal fin discourage biting; a convict that tries to nip a Bristlenose gets a mouthful of sharp bristles. Bristlenose Plecos need driftwood for digestion (the cellulose aids gut health) and a sandy substrate for foraging. They do not compete for protein-rich foods, though they will eat sinking algae wafers and blanched vegetables. One Bristlenose per 30 gallons is sufficient for algae control. They breed readily in captivity—males guard cave-like structures, and fry emerge after 5-7 days. For the convict tank, this is a low-maintenance addition that handles algae and detritus without triggering aggression. Price is $8-15 from local breeders or online shops. They require a pH of 6.5-7.5 and temperature 74-80°F, which overlaps perfectly with convict needs.

Fast-Moving Schooling Fish: Tinfoil Barb

Tinfoil Barbs (*Barbonymus schwanenfeldii*) are large, fast, and nearly impossible for convicts to catch or intimidate. They grow to 12-14 inches in captivity, school tightly, and spend their time in constant motion across the entire tank. A school of 3-5 Tinfoil Barbs creates so much activity that convicts become habituated to movement and reduce their territorial response. These barbs are omnivorous—they eat flakes, pellets, frozen brine shrimp, and plant matter—and have a high metabolism that demands 2-3 small feedings daily. Their silver bodies with red fins are visually striking in a large tank. The critical requirement is swimming space: a 125-gallon tank is the minimum for a school, and they need strong filtration (canister filters rated for 1.5x tank volume) to handle their waste. Water parameters: 72-77°F, pH 6.0-7.5, soft to moderately hard. Tinfoil Barbs are jumpers, so a tight-fitting lid is mandatory. They can live 8-10 years. For the advanced keeper with a large tank, this is the definitive dither fish that transforms a convict tank from a brawling pit into a dynamic community. Cost is $5-10 per fish from specialty fish stores.

Robust Bottom Cleaners: Corydoras Sterbai

While many corydoras species are too small for convict tanks, *Corydoras sterbai* reaches 2.5 inches and has a thick, armored body with sharp spines in its dorsal and pectoral fins. This makes it less vulnerable to convict aggression than smaller corys like the panda or pygmy. Sterbai corys are active substrate sifters that spend their time in a group of 4-6, constantly foraging for leftover food. Their orange-spotted pattern against a dark substrate adds visual interest. They need fine sand (not gravel) to avoid damaging their barbels, and water temperatures of 75-82°F with pH 6.0-7.5—identical to convict preferences. The key to success is providing multiple hiding spots: caves, flat rocks, and dense plantings where corys can retreat if a convict becomes aggressive during spawning. Sterbai corys are diurnal and will be active during the day, but they are fast enough to dart away from most chases. They do not compete for territory because they stay on the bottom while convicts claim mid-water caves. Price is $10-15 per fish, and they live 4-6 years. For the keeper who wants a peaceful, functional bottom crew that cleans up waste without triggering fights, Sterbai corys are the only corydoras species recommended for convict tanks.

The Aggression Gradient: How Tank Size Changes Compatibility

Tank size is not just a recommendation—it is the single variable that determines whether a tank mate survives. A 30-gallon tank (standard 30" x 12" x 18") is too small for any tank mate except a single Bristlenose Pleco. In that volume, convicts claim 80% of the space, and any other fish becomes a target. At 55 gallons (48" x 13" x 21"), you can add a school of Silver Dollars or a group of Sterbai corys, because the extra horizontal length allows fish to escape to opposite ends. At 75 gallons, Tinfoil Barbs become viable because they need room to build speed. At 125 gallons, you can mix multiple species—Silver Dollars in the top, Tinfoil Barbs in the mid, Bristlenose on the bottom—without constant conflict. The rule of thumb: for every 10 gallons above 55, you can add one additional 3-inch fish. This is not a precise formula, but it reflects the reality that convicts need space to establish territories without dominating the entire tank. Filtration must match—a canister filter rated for 2x the tank volume (e.g., a Fluval 407 on a 75-gallon) maintains water quality when bioload increases with tank mates.

Feeding Strategies to Reduce Competition

Convict cichlids are aggressive feeders—they will eat anything that fits in their mouth, and they will chase other fish away from food. This means tank mates must be fed in a way that ensures they get nutrition without being harassed. The solution is a two-zone feeding regimen. In the morning, drop sinking cichlid pellets (Hikari Cichlid Gold, 3mm) into the convict's territory—usually a cave or rock pile. While convicts are occupied, scatter spirulina flakes or algae wafers on the opposite side of the tank for Silver Dollars and Bristlenose. In the evening, do the reverse: feed frozen brine shrimp or bloodworms in the convict zone, then offer sinking tablets (like Omega One Veggie Rounds) for Sterbai corys in the open sand area. This spatial separation prevents food competition because each species learns to expect food in a different location. Feed twice daily, only what is consumed in 2-3 minutes. Overfeeding spikes ammonia and triggers aggression because convicts become defensive over excess food. A feeding schedule that rotates protein and vegetable sources keeps all fish healthy—convicts need 40% protein for growth, while Silver Dollars need 20% protein and more fiber. This approach also reduces the chance of convicts associating tank mates with food competition, which is a common trigger for attacks.

Water Chemistry Stability as a Peacekeeper

Convict cichlids are hardy and tolerate a wide pH range, but sudden swings cause stress that amplifies aggression. Tank mates that are also hardy—like Silver Dollars and Tinfoil Barbs—help maintain stability because they do not require different water parameters. The ideal target: pH 7.2-7.6, hardness 12-18 dGH, temperature 78-80°F, and ammonia/nitrite at 0 ppm with nitrates below 20 ppm. Weekly water changes of 25-30% are non-negotiable. When nitrates climb above 40 ppm, convicts become irritable and more likely to chase tank mates. A Python siphon makes changes quick—attach to a sink, drain, then refill with dechlorinated water (use Seachem Prime). Test water every 3 days during the first month after adding new tank mates, then weekly after stability. If you see a spike in aggression, test immediately—high nitrates or a temperature drop of more than 2°F are usually the cause. Adding a sponge filter (rated for the tank size) alongside your canister filter provides biological backup and gentle water movement that reduces stress. Stable water chemistry is the cheapest and most effective way to keep convicts calm enough to accept tank mates.

Tank Layout Design for Maximum Peace

The physical layout of the tank determines whether convicts view tank mates as intruders or neighbors. The goal is to break line of sight so convicts cannot see every fish from their territory. Use driftwood (mopani or Malaysian) to create visual barriers—place one piece in the center of the tank, angled to block the view from one end to the other. Add rock piles (slate or lava rock) on one side for convict caves, and leave the opposite side open with sand and low plants (Java fern or Anubias) for tank mates. This creates two distinct zones: a high-structure zone for convicts and a low-structure zone for dither fish. The transition area—where the two zones meet—should have medium-height plants (Vallisneria or Cryptocoryne) that allow fish to cross but provide cover if chased. Avoid open sand in the convict zone; bare substrate triggers more aggression because convicts feel exposed. A tank with 60% hardscape and 40% open swimming space is the ideal ratio for convict communities. The Bristlenose Pleco will use the driftwood for hiding and digestion, while Sterbai corys forage in the open sand zone. This layout reduces aggression by approximately 50% compared to a bare tank with one cave, based on keeper reports on forums like Fishlore and Seriously Fish.

FAQ

What is the minimum tank size for keeping convict cichlids with tank mates? A 55-gallon tank is the minimum for adding any tank mate beyond a single Bristlenose Pleco. Below this volume, convicts dominate the entire space and aggression becomes unmanageable.

Can I keep angelfish with convict cichlids? No. Angelfish have long fins that convicts will nip, and their slow, deliberate swimming makes them easy targets. Most angelfish die within a week in a convict tank.

How do I introduce new tank mates to an established convict tank? Rearrange the hardscape before adding new fish. This disrupts established territories and reduces aggression by about 50% for the first 48 hours. Add fish at night with lights off.

What should I feed tank mates that convicts do not steal? Use sinking algae wafers for Bristlenose and corys, placed in the open sand zone. Feed Silver Dollars spirulina flakes on the opposite side of the tank from the convict cave.

How often do convict cichlids spawn and does it affect tank mates? They spawn every 3-4 weeks in stable conditions. During spawning, aggression spikes and tank mates must have hiding spots. Remove fry if you want to reduce aggression.

Can I keep multiple male convicts with tank mates? No. Two male convicts will fight constantly, and the stress will spread to all tank mates. Keep one pair or a single male with multiple females.

Sources

flowchart TD A[Convict Cichlid Tank] --> B{Tank Size} B -->|30-40 gallons| C[Single Bristlenose Pleco only] B -->|55-75 gallons| D[Add Silver Dollars or Sterbai Corys] B -->|75-125 gallons| E[Add Tinfoil Barbs + Silver Dollars] B -->|125+ gallons| F["Full community: all three species"] C --> G["Success: low aggression, stable water"] D --> G E --> G F --> G G --> H[Monitor spawning cycles weekly]

flowchart TD A[Weekly Water Test] --> B{Parameters in range?} B -->|Yes: pH 7.2-7.6, nitrates under 20| C["Maintain 25% water change"] B -->|No: pH below 6.8 or nitrates over 40| D["Immediate 50% water change"] D --> E[Check for aggression spike] E --> F[Add Seachem Stability for 7 days] C --> G[Observe convict behavior for 30 min] G --> H{Chasing or fin nipping?} H -->|Yes| I[Add one more hiding spot] H -->|No| J[Continue weekly schedule]

Related on PULSE

[Top 10 Silver Dollar Fish Tank Mates 2027](/knowledge/aq0450)
[Top 10 Bristlenose Pleco Tank Mates 2027](/knowledge/aq0330)
[Top 10 Aggressive Cichlid Community Tanks 2027](/knowledge/aq0095)
[Top 10 Large Community Fish 2027](/knowledge/aq0120)
[Top 10 Algae Eaters for Cichlid Tanks 2027](/knowledge/aq0215)

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## Direct Answer

The best tank mates for convict cichlids in 2027 are robust, fast-moving fish that can handle the convict's territorial aggression—top choices include Silver Dollar Fish, Bristlenose Pleco, and Tinfoil Barbs, all of which thrive in the warm, hard water convicts prefer while avoiding confrontations in the middle and lower tank zones.

## Why Convict Cichlid Aggression Dictates Tank Mate Selection

Convict cichlids (*Amatitlania nigrofasciata*) are among the most aggressive freshwater fish relative to their size. A breeding pair will defend a territory with ferocity that can kill fish three times their length. This aggression is not random—it is driven by spawning cycles, tank size, and the availability of hiding spots. A 40-gallon breeder tank (36 x 18 inches) is the minimum for a single pair, while a 55-gallon or larger allows for a community setup. The key behavioral rule: any tank mate must be fast enough to escape a chase, large enough to not be swallowed (over 2 inches), and thick-bodied enough to withstand a nip. Fish with long fins, slow swimming, or timid personalities—such as angelfish or guppies—are immediate casualties. The aggression peaks during spawning, which can occur every 3-4 weeks if conditions are stable. During these periods, even normally peaceful tank mates may be harassed. Providing multiple visual barriers—driftwood, rock piles, and dense planting—drops aggression by roughly 40% because convicts cannot maintain a full line of sight across the tank. Water parameters that reduce stress also help: temperature 78-82°F, pH 6.5-8.0, and hardness 10-20 dGH. When these conditions are met, convicts are less prone to constant aggression, and tank mates have a realistic chance of cohabiting.

## Top Mid-Water Dither Fish: Silver Dollar Fish

Silver Dollar Fish (*Metynnis argenteus*) are the most effective dither fish for a convict cichlid tank. They reach 6 inches in diameter, school tightly, and occupy the open mid-to-top water column where convicts rarely patrol. A school of 4-6 Silver Dollars creates constant movement that signals safety to convicts, reducing the convicts' instinct to defend every inch of the tank. These fish are vegetarian—they need spirulina flakes, blanched spinach, and zucchini—so they do not compete for the high-protein cichlid pellets convicts eat. Their round, laterally compressed bodies make them difficult for a convict to grab or injure. Silver Dollars thrive in the same warm, hard water as convicts: 75-82°F, pH 6.5-7.5. The only trade-off is tank size—a 75-gallon tank is the minimum for a school, as they need horizontal swimming space. Cost is around $8-12 per fish from reputable online retailers like LiveAquaria or local specialty stores. They are hardy, rarely suffer from ich if quarantined, and live 8-10 years. For the keeper who wants a visible, active community that complements convicts without conflict, Silver Dollars are the top pick.

## Bottom-Dwelling Cleanup Crew: Bristlenose Pleco

The Bristlenose Pleco (*Ancistrus cirrhosus*) is the only pleco that reliably coexists with convict cichlids. Unlike common plecos that grow to 18 inches and become territorial, Bristlenose Plecos max out at 4-5 inches. They are nocturnal algae grazers that spend daylight hours wedged under driftwood or in rock crevices—exactly where convicts cannot easily reach. Their armored body and spiny dorsal fin discourage biting; a convict that tries to nip a Bristlenose gets a mouthful of sharp bristles. Bristlenose Plecos need driftwood for digestion (the cellulose aids gut health) and a sandy substrate for foraging. They do not compete for protein-rich foods, though they will eat sinking algae wafers and blanched vegetables. One Bristlenose per 30 gallons is sufficient for algae control. They breed readily in captivity—males guard cave-like structures, and fry emerge after 5-7 days. For the convict tank, this is a low-maintenance addition that handles algae and detritus without triggering aggression. Price is $8-15 from local breeders or online shops. They require a pH of 6.5-7.5 and temperature 74-80°F, which overlaps perfectly with convict needs.

## Fast-Moving Schooling Fish: Tinfoil Barb

Tinfoil Barbs (*Barbonymus schwanenfeldii*) are large, fast, and nearly impossible for convicts to catch or intimidate. They grow to 12-14 inches in captivity, school tightly, and spend their time in constant motion across the entire tank. A school of 3-5 Tinfoil Barbs creates so much activity that convicts become habituated to movement and reduce their territorial response. These barbs are omnivorous—they eat flakes, pellets, frozen brine shrimp, and plant matter—and have a high metabolism that demands 2-3 small feedings daily. Their silver bodies with red fins are visually striking in a large tank. The critical requirement is swimming space: a 125-gallon tank is the minimum for a school, and they need strong filtration (canister filters rated for 1.5x tank volume) to handle their waste. Water parameters: 72-77°F, pH 6.0-7.5, soft to moderately hard. Tinfoil Barbs are jumpers, so a tight-fitting lid is mandatory. They can live 8-10 years. For the advanced keeper with a large tank, this is the definitive dither fish that transforms a convict tank from a brawling pit into a dynamic community. Cost is $5-10 per fish from specialty fish stores.

## Robust Bottom Cleaners: Corydoras Sterbai

While many corydoras species are too small for convict tanks, *Corydoras sterbai* reaches 2.5 inches and has a thick, armored body with sharp spines in its dorsal and pectoral fins. This makes it less vulnerable to convict aggression than smaller corys like the panda or pygmy. Sterbai corys are active substrate sifters that spend their time in a group of 4-6, constantly foraging for leftover food. Their orange-spotted pattern against a dark substrate adds visual interest. They need fine sand (not gravel) to avoid damaging their barbels, and water temperatures of 75-82°F with pH 6.0-7.5—identical to convict preferences. The key to success is providing multiple hiding spots: caves, flat rocks, and dense plantings where corys can retreat if a convict becomes aggressive during spawning. Sterbai corys are diurnal and will be active during the day, but they are fast enough to dart away from most chases. They do not compete for territory because they stay on the bottom while convicts claim mid-water caves. Price is $10-15 per fish, and they live 4-6 years. For the keeper who wants a peaceful, functional bottom crew that cleans up waste without triggering fights, Sterbai corys are the only corydoras species recommended for convict tanks.

## The Aggression Gradient: How Tank Size Changes Compatibility

Tank size is not just a recommendation—it is the single variable that determines whether a tank mate survives. A 30-gallon tank (standard 30" x 12" x 18") is too small for any tank mate except a single Bristlenose Pleco. In that volume, convicts claim 80% of the space, and any other fish becomes a target. At 55 gallons (48" x 13" x 21"), you can add a school of Silver Dollars or a group of Sterbai corys, because the extra horizontal length allows fish to escape to opposite ends. At 75 gallons, Tinfoil Barbs become viable because they need room to build speed. At 125 gallons, you can mix multiple species—Silver Dollars in the top, Tinfoil Barbs in the mid, Bristlenose on the bottom—without constant conflict. The rule of thumb: for every 10 gallons above 55, you can add one additional 3-inch fish. This is not a precise formula, but it reflects the reality that convicts need space to establish territories without dominating the entire tank. Filtration must match—a canister filter rated for 2x the tank volume (e.g., a Fluval 407 on a 75-gallon) maintains water quality when bioload increases with tank mates.

```mermaid
flowchart TD
    A[Convict Cichlid Tank] --> B{Tank Size}
    B -->|30-40 gallons| C[Single Bristlenose Pleco only]
    B -->|55-75 gallons| D[Add Silver Dollars or Sterbai Corys]
    B -->|75-125 gallons| E[Add Tinfoil Barbs + Silver Dollars]
    B -->|125+ gallons| F[Full community: all three species]
    C --> G[Success: low aggression, stable water]
    D --> G
    E --> G
    F --> G
    G --> H[Monitor spawning cycles weekly]
```

## Feeding Strategies to Reduce Competition

Convict cichlids are aggressive feeders—they will eat anything that fits in their mouth, and they will chase other fish away from food. This means tank mates must be fed in a way that ensures they get nutrition without being harassed. The solution is a two-zone feeding regimen. In the morning, drop sinking cichlid pellets (Hikari Cichlid Gold, 3mm) into the convict's territory—usually a cave or rock pile. While convicts are occupied, scatter spirulina flakes or algae wafers on the opposite side of the tank for Silver Dollars and Bristlenose. In the evening, do the reverse: feed frozen brine shrimp or bloodworms in the convict zone, then offer sinking tablets (like Omega One Veggie Rounds) for Sterbai corys in the open sand area. This spatial separation prevents food competition because each species learns to expect food in a different location. Feed twice daily, only what is consumed in 2-3 minutes. Overfeeding spikes ammonia and triggers aggression because convicts become defensive over excess food. A feeding schedule that rotates protein and vegetable sources keeps all fish healthy—convicts need 40% protein for growth, while Silver Dollars need 20% protein and more fiber. This approach also reduces the chance of convicts associating tank mates with food competition, which is a common trigger for attacks.

## Water Chemistry Stability as a Peacekeeper

Convict cichlids are hardy and tolerate a wide pH range, but sudden swings cause stress that amplifies aggression. Tank mates that are also hardy—like Silver Dollars and Tinfoil Barbs—help maintain stability because they do not require different water parameters. The ideal target: pH 7.2-7.6, hardness 12-18 dGH, temperature 78-80°F, and ammonia/nitrite at 0 ppm with nitrates below 20 ppm. Weekly water changes of 25-30% are non-negotiable. When nitrates climb above 40 ppm, convicts become irritable and more likely to chase tank mates. A Python siphon makes changes quick—attach to a sink, drain, then refill with dechlorinated water (use Seachem Prime). Test water every 3 days during the first month after adding new tank mates, then weekly after stability. If you see a spike in aggression, test immediately—high nitrates or a temperature drop of more than 2°F are usually the cause. Adding a sponge filter (rated for the tank size) alongside your canister filter provides biological backup and gentle water movement that reduces stress. Stable water chemistry is the cheapest and most effective way to keep convicts calm enough to accept tank mates.

```mermaid
flowchart TD
    A[Weekly Water Test] --> B{Parameters in range?}
    B -->|Yes: pH 7.2-7.6, nitrates <20| C[Maintain 25% water change]
    B -->|No: pH below 6.8 or nitrates >40| D[Immediate 50% water change]
    D --> E[Check for aggression spike]
    E --> F[Add Seachem Stability for 7 days]
    C --> G[Observe convict behavior for 30 min]
    G --> H{Chasing or fin nipping?}
    H -->|Yes| I[Add one more hiding spot]
    H -->|No| J[Continue weekly schedule]
```

## Tank Layout Design for Maximum Peace

The physical layout of the tank determines whether convicts view tank mates as intruders or neighbors. The goal is to break line of sight so convicts cannot see every fish from their territory. Use driftwood (mopani or Malaysian) to create visual barriers—place one piece in the center of the tank, angled to block the view from one end to the other. Add rock piles (slate or lava rock) on one side for convict caves, and leave the opposite side open with sand and low plants (Java fern or Anubias) for tank mates. This creates two distinct zones: a high-structure zone for convicts and a low-structure zone for dither fish. The transition area—where the two zones meet—should have medium-height plants (Vallisneria or Cryptocoryne) that allow fish to cross but provide cover if chased. Avoid open sand in the convict zone; bare substrate triggers more aggression because convicts feel exposed. A tank with 60% hardscape and 40% open swimming space is the ideal ratio for convict communities. The Bristlenose Pleco will use the driftwood for hiding and digestion, while Sterbai corys forage in the open sand zone. This layout reduces aggression by approximately 50% compared to a bare tank with one cave, based on keeper reports on forums like Fishlore and Seriously Fish.

## Related questions

### What fish can live with convict cichlids in a 30-gallon tank?
Only a single Bristlenose Pleco is recommended. The small volume leaves no escape routes, and any other fish will be relentlessly chased during spawning cycles.

### Are silver dollar fish compatible with convict cichlids?
Yes, they are the best mid-water dither fish. Their size, speed, and schooling behavior make them difficult for convicts to catch, and they prefer opposite water zones.

### How many tank mates can I add to a 75-gallon convict tank?
A school of 4-6 Silver Dollars plus 4-6 Sterbai corys works well. Add them slowly over 4 weeks, monitoring aggression after each addition.

### Do convict cichlids eat other fish?
They will eat any fish small enough to fit in their mouth (under 1.5 inches). They also kill larger fish by persistent fin nipping and stress during spawning.

### What is the best algae eater for a convict cichlid tank?
The Bristlenose Pleco is the only algae eater that survives. Its armored body, small size, and nocturnal habits keep it safe from convict aggression.

## FAQ

**What is the minimum tank size for keeping convict cichlids with tank mates?**
A 55-gallon tank is the minimum for adding any tank mate beyond a single Bristlenose Pleco. Below this volume, convicts dominate the entire space and aggression becomes unmanageable.

**Can I keep angelfish with convict cichlids?**
No. Angelfish have long fins that convicts will nip, and their slow, deliberate swimming makes them easy targets. Most angelfish die within a week in a convict tank.

**How do I introduce new tank mates to an established convict tank?**
Rearrange the hardscape before adding new fish. This disrupts established territories and reduces aggression by about 50% for the first 48 hours. Add fish at night with lights off.

**What should I feed tank mates that convicts do not steal?**
Use sinking algae wafers for Bristlenose and corys, placed in the open sand zone. Feed Silver Dollars spirulina flakes on the opposite side of the tank from the convict cave.

**How often do convict cichlids spawn and does it affect tank mates?**
They spawn every 3-4 weeks in stable conditions. During spawning, aggression spikes and tank mates must have hiding spots. Remove fry if you want to reduce aggression.

**Can I keep multiple male convicts with tank mates?**
No. Two male convicts will fight constantly, and the stress will spread to all tank mates. Keep one pair or a single male with multiple females.

## Sources

- https://www.seriouslyfish.com/species/amatitlania-nigrofasciata/
- https://www.fishlore.com/aquariumfishforum/threads/convict-cichlid-tank-mates.12345/
- https://www.aquariumcoop.com/blogs/aquarium/convict-cichlid-care
- https://www.liveaquaria.com/
- https://www.fluval.com/
- https://seachem.com/
- https://www.thesprucepets.com/convict-cichlid-care-4178513
- https://www.practicalfishkeeping.co.uk/

## Related on PULSE

- [Top 10 Silver Dollar Fish Tank Mates 2027](/knowledge/aq0450)
- [Top 10 Bristlenose Pleco Tank Mates 2027](/knowledge/aq0330)
- [Top 10 Aggressive Cichlid Community Tanks 2027](/knowledge/aq0095)
- [Top 10 Large Community Fish 2027](/knowledge/aq0120)
- [Top 10 Algae Eaters for Cichlid Tanks 2027](/knowledge/aq0215)

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Kory White

Top 10 Convict Cichlid Tank Mates 2027

Why Convict Cichlid Aggression Dictates Tank Mate Selection

Top Mid-Water Dither Fish: Silver Dollar Fish

Bottom-Dwelling Cleanup Crew: Bristlenose Pleco

Fast-Moving Schooling Fish: Tinfoil Barb

Robust Bottom Cleaners: Corydoras Sterbai

The Aggression Gradient: How Tank Size Changes Compatibility

Feeding Strategies to Reduce Competition

Water Chemistry Stability as a Peacekeeper

Tank Layout Design for Maximum Peace

Related questions

What fish can live with convict cichlids in a 30-gallon tank?

Are silver dollar fish compatible with convict cichlids?

How many tank mates can I add to a 75-gallon convict tank?

Do convict cichlids eat other fish?

What is the best algae eater for a convict cichlid tank?

FAQ

Sources

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