10-Gallon Stocking Plans: 5 Combinations That Actually Work
A 10-gallon is the most popular first tank — and the easiest to overstock, because almost every fish in the shop is a baby that will grow. These five plans are complete, compatible, and sized for the adults those babies become.
Plan A — The Classic School: 8 Neon Tetras
| Fish | Number | Stocking level | Set temperature |
|---|---|---|---|
| Neon Tetra | 8 | 72% — comfortable | 72–78 °F |
The safest first plan there is. Neons are a schooling fish — below six they hide and stress — so the whole tank goes to one proper school. You'll see natural schooling behaviour instead of eight frightened individuals. Add all eight at once to a fully cycled tank so the group settles together. Leave the remaining headroom empty; it's what forgives a late water change.
Plan B — One Beautiful Fish: Betta + Mystery Snail
| Fish | Number | Stocking level | Set temperature |
|---|---|---|---|
| Betta (male) | 1 | 41% — lightly stocked | 76–82 °F |
| Mystery Snail | 1 |
A betta is a territorial, solitary fish — a 10-gallon all to himself is a palace, not a compromise. One mystery snail adds movement and algae grazing without triggering the betta's aggression (most bettas ignore snails entirely; watch yours for the first days, as temperaments vary). Keep the filter flow gentle and give him a leaf or cave near the surface to rest on.
Plan C — Colour and Motion: 5 Male Guppies
| Fish | Number | Stocking level | Set temperature |
|---|---|---|---|
| Guppy (all male) | 5 | 90% — comfortable, at the top of the band | 72–82 °F |
Guppies are livebearers: one pregnant female — and females in shops are usually already pregnant — can turn five fish into fifty. An all-male group gives you the colour without the population explosion. At 90% this plan is full: no tankmates, and weekly 25–30% water changes are part of the deal.
Plan D — The Nano Community: Gourami, Embers & Shrimp
| Fish | Number | Stocking level | Set temperature |
|---|---|---|---|
| Honey Gourami | 1 | 73% — comfortable | 77–78 °F |
| Ember Tetra | 8 | ||
| Cherry Shrimp | 6 |
Three layers in one small tank: the gourami patrols the top, embers school in the middle, shrimp graze the bottom. Ember tetras are tiny (under an inch as adults), which is what makes a three-species 10-gallon possible at all. Note the shared temperature window is narrow — 77–78 °F — so a reliable heater matters here (see the heater calculator). Add the shrimp last, once the tank has been running a couple of months and has biofilm to graze.
Plan E — The Planted Nano: Chili Rasboras & Shrimp
| Fish | Number | Stocking level | Set temperature |
|---|---|---|---|
| Chili Rasbora | 10 | 73% — comfortable | 74–78 °F |
| Cherry Shrimp | 10 |
Chili rasboras are among the smallest fish in the hobby — adults are about 0.8 inches — and they colour up best in a planted tank with dim light and a proper group; ten is a group that shows real behaviour. The shrimp will likely start a colony. This is the connoisseur's 10-gallon: small fish, dense plants, very stable water.
How to use these plans
- Cycle first, always. No plan survives an uncycled tank. Follow the fishless cycle guide and wait for it to finish — typically 2–6 weeks.
- Add fish in stages (except single-school Plan A): a group at a time, a week or more apart, so the filter bacteria can grow with the load.
- Want to tweak a plan? Run your version through the stocking calculator — and keep the result at or below 90% for a first tank.
- Bigger tank? See the 20-gallon stocking plans.