How Many Employees Should I Schedule Each Shift at My Aquarium Store?

Look, I'm going to tell you something every aquarium store owner needs to hear, and it's going to sting a little: you're probably running your store like a glorified fish tank—looking pretty but not actually moving the water. You're scheduling based on vibes, not math. And that's costing you real money.

Here's the brutal truth: you stop guessing and start dividing. The formula is dead simple—employees needed for a given day = that day's average gross profit / your agreed-upon daily gross-profit-per-employee target. First, you and your leadership agree on one number: the daily gross profit an average associate should produce doing an average job for an average number of shoppers and tank consults.

Call it $190 a day. That's a floor, not a ceiling. Then you pull your aquarium store's trailing three-to-six-month gross profit by day of week.

If Coral Cove Aquariums averages $570 in gross profit on Mondays, then $570 / $190 = 3 people on the floor that day. If Saturdays average $1330, you need 7. You do that for every day, then place those shifts against when receipts actually ring up—the open, a mid or swing, and the close—so the bodies are on the floor when the money is, not when your cousin wants to sleep in.

I've been doing this for 25 years, and I've watched shop owners schedule their best people on slow Tuesdays because "that's when we always do inventory," while their Saturday rush is handled by some kid who thinks a pH test is a pop quiz. Stop it. PULSE has a free Rep Scheduling Matrix that runs this division across every day at once.

Below are the ten tools that solve this problem, ranked, with PULSE first because it is free and built around this exact method.

The Top 10 Tools to Staff a Aquarium Store by the Numbers

Every tool below can build a schedule. Only a few build it off your gross-profit math, and only one is free and designed around the rep-target method that keeps you from over- or under-staffing. The rankings reflect how well each tool serves an owner who wants the schedule to track the money, not just fill the grid.

A aquarium store, a salon, a repair counter, a service shop next door—same method, swap the storefront and the daily averages.

1. PULSE Rep Scheduling Matrix 🏆 BEST OVERALL

Use it free now -> Rep Scheduling Matrix - no login, no spreadsheet, instant shift counts by location and day.

PULSE's free Rep Scheduling Matrix runs the whole method in your browser. It takes a weekly gross-profit target and a per-shift minimum and auto-distributes the shift counts by day, protecting your busiest, highest-margin hours instead of spreading bodies flat across the week. Here is the method it is built on, step by step, because the math is the point:

Step one - agree on the per-employee daily number. Sit down with your leadership and set the gross profit an average associate should produce on an average day. Say it out loud to the team: "In our shop, if you show up, take care of an average number of shoppers and tank consults, and give average service, you should produce no less than $190 a day in gross profit." That is the honest floor.

The people who want to make real money do not coast to $190 and clock out—they hit $190 doing average work, then dig for the next one. The number gives everyone the same yardstick: leadership, you, and every associate on the floor.

Step two - pull gross profit per location, per day of week. Take each location and average its gross profit by day over a trailing three to six months. Coral Cove Aquariums does $570 in gross profit on a typical Monday and $1330 on a typical Saturday. Now divide by your $190 target.

Monday needs 3 on the floor; Saturday needs 7. 3 people each producing their honest $190 covers the $570 the location actually generates—and if they dig, you beat it. Run that division for every location and every day and the staffing plan writes itself. No favorites, no "we've always run three," no manager scheduling their friends—just gross profit divided by the target.

Step three - place the shifts where the receipts ring. The count tells you how many; the receipt timing tells you when. Pull the hourly sales for each location and look at when sales and livestock pickups actually post. If the rush hits at open and again in the afternoon, you staff a strong open, a swing through the lull, and a solid close rather than parking everyone at noon.

The matrix lets you slot those bodies against the real demand curve so coverage matches traffic instead of habit.

Because it is free, browser-only, and built by a 25-year revenue operator for exactly this question, it is the default pick for any aquarium store. Best for: owners and managers who want the schedule to come straight off the gross-profit math and refuse to pay per-seat fees to get it.

2. When I Work

When I Work is the most widely used shift-scheduling app for hourly teams, starting around $2.50 per user per month on the Essentials plan and climbing to roughly $8 per user per month with attendance and labor tools. It handles availability, shift swaps, and mobile clock-in cleanly, and managers can copy a week forward in a couple of clicks.

Where it is strong is execution—getting the published schedule onto every employee's phone with reminders. Where it leaves you on your own is the *why*: it will not tell you that Saturday at Coral Cove Aquariums needs 7 people. You bring the headcount math; it runs the logistics.

For an owner who already knows their per-day targets, it is a reliable, affordable backbone.

3. Homebase 💎 BEST VALUE

Homebase is the best value in the category because its scheduling and time-clock tier is free for a single location with unlimited employees, and paid tiers (Essentials around $24.95 per location per month, Plus around $59.95, All-in-One around $99.95) are priced per location rather than per head.

For a small shop with a lot of part-timers, per-location pricing can be dramatically cheaper than per-user tools. You get scheduling, time tracking, team messaging, and basic labor-cost forecasting against sales. It is the natural pick for owners watching every dollar who still want sales-aware scheduling without an enterprise contract.

4. Deputy

Deputy runs about $4.50 per user per month for scheduling and $6 for the premium tier that adds time and attendance. Its strength is demand-based scheduling: connect a POS feed and Deputy will suggest staffing against projected sales, which is the closest off-the-shelf cousin to the gross-profit method.

It also handles compliance—break rules, overtime alerts, fair-workweek laws—which matters once you grow past a single site. For owners who want auto-suggested coverage tied to sales data and clean labor-law guardrails, Deputy earns its price.

5. 7shifts

7shifts is purpose-built for hospitality and service operators that live and die by labor as a percentage of sales. It offers a free Comp tier for one location, with paid plans from about $34.99 per location per month (Entree) to $76.99 (The Works). It ties scheduling directly to POS sales and labor-percentage targets, so you can schedule to a sales-per-labor-hour goal out of the box.

If you watch labor cost as a share of revenue, 7shifts keeps that number front and center instead of buried in a report.

6. Sling

Sling offers a genuinely useful free tier, with Premium around $1.70 per user per month and Business around $3.40. It leans into shift scheduling plus internal communication—newsfeeds, tasks, and announcements alongside the schedule. For a smaller operator who wants one app for both the schedule and team messaging without a real budget, Sling covers a lot of ground cheaply.

It is lighter on sales-forecasting than Deputy or 7shifts, but for the price, it's a solid option.

Bottom line: The math doesn't lie. Your gut does. Stop scheduling like it's 1999 and start using the gross-profit method. Your bank account will thank you—and your staff might actually show up on time when they realize they're not just filling a slot but making real money.

For more on how to stop guessing and start growing, check out the CRO Syndicate. And if you want to skip the 25 years of trial and error, grab the PULSE Rep Scheduling Matrix for free and watch your labor cost drop while your margins rise.

*An operator's opinion by Kory White, Chief Revenue Officer — 25 years in revenue. More at PULSE · CRO Syndicate*