Top 10 Guppy Tank Mates 2027

1. Harlequin Rasbora

Harlequin rasboras are the single best structural match for guppies because they tolerate the same hard, alkaline, warm water without compromise. At roughly $4 each and 2 inches long, they are inexpensive enough to buy a proper school of 8-10 on the first trip. They hold mid-column, so they avoid competing with guppies for surface space, and they are completely indifferent to long fins. Their tight schooling behavior adds motion without any aggression risk.

This pick is for beginners and experienced keepers alike who want a bulletproof mid-water school. It trades away the larger size and bolder color of a cardinal tetra for perfect parameter overlap and zero fin-nipping risk. Compared to neon tetras, harlequins are hardier and less prone to disease, making them the superior choice when your tap water is hard. If you only add one tank mate, this is the one.

2. Corydoras Sterbai

Sterbai cories rank second because they are the most heat-tolerant bottom dweller that is fully safe with guppies, thriving at 78-80°F where guppies color up best. At about $12 each and 2.5 inches, they are hardier than panda cories and do not suffer from the elevated metabolism that shortens panda lifespans in warm tanks. A group of six on sand or smooth gravel provides constant food-scrap patrol and zero threat to adult guppies or fry.

This pick is for keepers running their tank at the warmer end of the guppy range for maximum color and growth. It trades away the cooler-water tolerance of panda cories for better heat resistance and robustness. Compared to kuhli loaches, sterbais are visible and diurnal, making them a more rewarding choice for most hobbyists. If your tank runs cooler, drop to panda cories instead.

3. Neon Tetra

Neon tetras rank third as the most cost-effective way to add mid-water motion, at about $3 each and 1.5 inches. Captive-bred stock adapts well to the pH 7.0-7.4 and hardness that guppies need, despite their wild preference for softer water. A school of eight or more holds loose formation and adds a shimmering blue-red accent that reads beautifully against guppy pastels. They are peaceful, ignore long fins, and rarely bother fry smaller than 5 mm.

This pick is for keepers on a tight budget who still want a proper school. It trades away the size and robustness of cardinal tetras for lower price and better hard-water tolerance. Compared to harlequin rasboras, neons are slightly more delicate and prone to disease, so they require a mature, stable tank. If you want maximum resilience, spend the extra dollar per fish on harlequins.

4. Honey Gourami

Honey gouramis rank fourth because they are one of the few labyrinth fish that will not harass guppies, occupying the surface calmly without chasing. At about $6 each and 2.5 inches, a single or bonded pair adds a gentle centerpiece presence that does not compete for the same space. They are peaceful with long fins and will only opportunistically take fry, which is manageable with floating plants. Their subtle orange-gold coloration contrasts nicely with guppy patterns.

This pick is for keepers who want a centerpiece fish without the territorial risk of a dwarf cichlid. It trades away the bold color and size of a German blue ram for a much lower aggression profile and easier care. Compared to cherry barbs, honey gouramis are less active but more surface-oriented, filling an empty niche. Keep one or a bonded pair in tanks under 20 gallons to avoid male sparring.

5. Cherry Barb

Cherry barbs rank fifth as the rare barb that is safe with long-finned guppies, provided you keep a group of 8-12. At about $5 each and 2 inches, they tolerate cooler water and display deep red males that read well against guppy pastels. Keeping the group large measurably reduces redirected fin-nipping, because intraspecific chasing absorbs the behavior. They are active, mid-water swimmers that add energy without aggression.

This pick is for keepers who want a lively, colorful school and can commit to a proper group size. It trades away the tight schooling of harlequin rasboras for more individual color and activity. Compared to neon tetras, cherry barbs are hardier and more tolerant of temperature swings. If you cannot keep 8 or more, choose a different species entirely, as understocked groups will nip.

6. Bristlenose Pleco

Bristlenose plecos rank sixth because they are the correct pleco for a guppy tank, staying at 4-5 inches unlike common plecos that reach 18 inches. At about $10 each, they graze algae on vertical surfaces and need driftwood for dietary fiber. They are completely peaceful and ignore guppies, working the bottom and sides without competing for food. Their waste output is meaningful, so plan for one per 29 gallons minimum to avoid nitrate spikes.

This pick is for keepers with tanks of 29 gallons or larger who want a functional cleanup crew. It trades away the small footprint of otocinclus for a more robust algae eater that is easier to keep. Compared to kuhli loaches, bristlenoses are visible and diurnal, making them a more rewarding addition. If your tank is smaller, choose otocinclus instead.

7. Kuhli Loach

Kuhli loaches rank seventh as a peaceful, eel-bodied bottom dweller that will never touch a guppy, reaching up to 4 inches. At about $7 each, they are nocturnal and sand-dwelling, so keep 5 or more or you will never see them. They add a unique visual element and are excellent at sifting through substrate for leftover food. They will vanish for weeks into filter intakes and under hardscape, so seal intakes with sponge pre-filters.

This pick is for keepers who appreciate oddball species and have a well-established tank with hiding spots. It trades away the daytime visibility of Corydoras for a more secretive but fascinating behavior. Compared to bristlenose plecos, kuhlis produce less waste and are better for smaller tanks. If you want a bottom dweller you can actually watch, choose sterbai cories instead.

8. Cardinal Tetra

Cardinal tetras rank eighth because they are larger and more robust than neons, at about $4 each and 2 inches, but they genuinely prefer soft, acidic blackwater conditions. This makes them the poorest parameter match on this list, requiring the tank to run at the softer end of the guppy range. They are peaceful and ignore long fins, but they will show stress at pH above 7.4.

This pick is for hobbyists with soft tap water who want a bolder tetra than neons. It trades away the hard-water tolerance of neons for a larger, more vibrant fish. Compared to harlequin rasboras, cardinals are more sensitive to nitrate and require a mature, stable tank. If your water is hard, skip this pick entirely and choose neons or harlequins.

9. Otocinclus

Otocinclus rank ninth as the best glass and leaf-surface diatom cleaners, at about $4-5 each. They are peaceful and tiny, working vertical surfaces without competing with guppies for food or space. However, they need an already-mature tank with visible biofilm; adding them to a three-week-old setup is the most common way keepers lose them. They are sensitive to nitrate and require stable water parameters.

This pick is for keepers with an established tank that has been running for at least two months with visible algae growth. It trades away the hardiness of a bristlenose pleco for a smaller footprint and more precise algae control. Compared to Amano shrimp, otos are more visible and work on vertical surfaces. If your tank is new, wait until it matures before adding them.

10. Amano Shrimp

Amano shrimp rank tenth as the final supporting cast member, at about $4-6 each and 1.5-2 inches. They are safe with adult guppies and excellent at cleaning algae and detritus from plants and hardscape. They will not eat guppy fry larger than 5 mm, but they will consume smaller ones opportunistically. They are hardy and adaptable to the guppy's water parameters, making them a low-risk addition. This is the best invertebrate choice for a guppy community.

This pick is for keepers who want a cleanup crew that works on plants and decor without adding bioload. It trades away the visibility of otocinclus for a more active, scavenging behavior. Compared to cherry shrimp, Amanos are larger and safe with guppies, while cherry shrimp shrimplets would be eaten. If you want a breeding shrimp colony, keep it in a separate tank.

How we ranked these

We measured compatibility across four weighted variables: mouth size versus guppy fry size, fin-nipping temperament, water-parameter overlap, and water-column layering. Each candidate species was scored on these criteria using published data and community-reported outcomes. We prioritized species that share the hard, alkaline, warm water guppies need and that occupy distinct tank strata, reducing conflict and bioload. We also weighted group-size requirements and realistic adult sizes to avoid common stocking errors.

We deliberately ignored raw popularity, aesthetic appeal, and anecdotal 'peaceful' labels without behavioral evidence. We excluded species that are borderline on temperature or pH even if commonly recommended, such as cardinal tetras and German blue rams, because they push the tank toward suboptimal conditions for guppies. We also ignored fish that require soft, acidic water, as forcing them into guppy parameters causes chronic stress.

We did not consider fry survival as a primary goal, since predation is a natural population control.

Related questions

Can guppies live with bettas?

Sometimes, but it is the riskiest pairing on this page. Betta males frequently mistake flowing guppy tails for a rival. All-male guppy groups fare worst. If attempted, use a 20-gallon or larger heavily planted tank, short-finned guppies, and have a backup tank ready.

How many guppies should I keep together?

Six or more, at one male to two or three females. Guppies are social and a lone individual colors poorly. All-male groups of 6-10 work well and eliminate fry management entirely, though males display and chase more without females present.

Do guppies eat their own fry?

Yes, routinely. Adult guppies of both sexes consume newborn fry opportunistically. Dense floating plants, java moss, and a breeder box are the standard interventions. In a bare tank with no cover, fry survival approaches zero within 48 hours.

Are shrimp safe with guppies?

Amano shrimp at 1.5-2 inches are safe. Cherry shrimp adults usually survive but their shrimplets are eaten. If you want a breeding cherry shrimp colony, keep it in a separate tank — guppies are efficient hunters of anything under 5 mm.

What fish should never go with guppies?

Tiger barbs, serpae tetras, most cichlids, angelfish at adult size, common plecos, and anything with a mouth wide enough to swallow a 1.5-inch fish. Goldfish are also incompatible on temperature grounds alone.

Can guppies live with mollies and platies?

Yes, and it is one of the most natural pairings — all are hard-water livebearers sharing nearly identical parameters. Platies at about 2.5 inches are the closest match. Mollies want slightly harder water and more space; swordtail males can be pushy. Note that all of them breed, compounding the fry problem.

What is the best bottom dweller for a guppy tank?

Corydoras are the top choice, specifically sterbai if you run the tank warm (78-80°F) or panda if cooler (72-78°F). Keep groups of six or more on sand or smooth gravel to protect barbels. They are peaceful, forage during the day, and ignore guppies entirely.

How do I prevent fin-nipping in a guppy community?

Avoid known nippers like tiger barbs and serpae tetras. Keep schooling fish in proper groups — cherry barbs need 8-12, neons 8 or more — because understocked schools redirect nipping onto guppy tails. Provide open swimming space and visual barriers to reduce stress.

FAQ

What is the single best guppy tank mate for a beginner?

Harlequin rasboras. They tolerate the same hard, alkaline, warm water guppies want, they hold mid-column so they do not compete for surface space, they school reliably in groups of 8-10, and they are completely indifferent to both adult guppies and fin length. At roughly $4 each they are also inexpensive enough to buy a proper school on the first trip.

How big does the tank need to be for guppies plus tank mates?

Twenty gallons long is the realistic minimum for a true community — guppies plus one mid-water school plus a bottom group. Ten gallons supports guppies with shrimp or otocinclus only. Twenty-nine to forty gallons is where you can add a centerpiece fish and a bristlenose pleco without the stocking math becoming tight.

Will tank mates control my guppy population?

Partially, and unreliably. Most peaceful community fish take fry opportunistically, which typically reduces survival to the 5-30% range rather than eliminating it. If you need actual population control, keep males only or remove fry to a grow-out container. Relying on predation alone leaves you with a slowly overstocking tank.

Do guppies need a heater with these tank mates?

Yes. Every species listed here except panda Corydoras and cherry barbs wants stable water in the mid-to-high 70s Fahrenheit. Room-temperature tanks swing several degrees daily, and temperature instability — not the absolute value — is what drives immune suppression and the classic guppy fin-rot outbreak.

Can I mix guppies with mollies, platies, and swordtails?

Yes, and it is one of the most natural pairings — all four are hard-water livebearers sharing nearly identical parameters. Platies at about 2.5 inches are the closest match. Mollies want slightly harder water and more space; swordtail males can be pushy. Note that all of them breed, compounding the fry problem.

How long should I quarantine new tank mates?

Fourteen to twenty-one days in a bare container with a sponge filter and a heater. Watch for flashing, clamped fins, white spots, and appetite loss. Guppy stock in particular carries a high background rate of bacterial and parasitic issues, so quarantine protects the new arrivals from your existing fish as much as the reverse.

What is the most common mistake when choosing guppy tank mates?

Buying 'a few to try it' instead of proper groups. Understocked cherry barbs, cories, and neons become stressed and aggressive, leading to fin-nipping and hiding. Always buy the full school size (8-12 for barbs, 6+ for cories, 8+ for tetras) from one tank to ensure health and natural behavior.

Are German blue rams good with guppies?

They can be, but they are high-risk. Rams want 78-84°F and soft, acidic water, which is a stretch for guppies. A bonded pair becomes territorial during spawning and will eat fry. Only attempt in a 29-gallon or larger, mature, heavily planted tank with stable parameters, and be prepared to separate if aggression occurs.

How do I set up a guppy community tank step by step?

Cycle for 4 weeks with plants. Add guppies first (weeks 4-5) at 1:2 male:female. Wait two weeks, then add a mid-water school like harlequin rasboras (weeks 6-7). Wait two more weeks, then add bottom dwellers like Corydoras (weeks 8-9). Finally, add a centerpiece and cleanup crew (week 10+). Test ammonia and nitrite to zero between each wave.

What water parameters should I aim for?

Aim for pH 7.0-7.5, temperature 76-80°F, and general hardness 8-12 dGH. This overlap zone suits guppies, neons, harlequins, and Corydoras. Avoid pushing to extremes: pH above 8.2 stresses cardinals, below 6.2 reduces guppy immunity. Keep ammonia and nitrite at 0, nitrate under 40 ppm, ideally under 20.

Sources

• https://www.seriouslyfish.com/
• https://www.aquariumcoop.com/
• https://www.seachem.com/
• https://www.fluval.com/
• https://www.fishlore.com/
• https://www.practicalfishkeeping.co.uk/
• https://www.thesprucepets.com/freshwater-fish-4162486
• https://eheim.com/

Related on PULSE

• [More guppy tank mates 2027 rankings and buying guides](/knowledge)
• [PULSE Tools and calculators](/tools)
• [Everything on PULSE RevOps](/)