A shrimp-only 10 gallon is one of the most rewarding aquariums you can run. No fish to worry about, no feeding competition, no predation on baby shrimp. Just a thriving colony of colourful invertebrates doing what shrimp do — grazing, breeding, and looking incredible against dark substrate and green plants. Here's how to set one up properly.
Why a shrimp-only tank?
Fish eat shrimp. Even "peaceful" fish like tetras and bettas will pick off baby shrimp. If you want your colony to grow and breed, the simplest solution is no fish at all. A shrimp-only 10 gallon can sustain a colony of 50–100+ cherry shrimp with minimal maintenance.
Which shrimp for a 10 gallon?
- Cherry Shrimp (Neocaridina) — the best beginner shrimp. Hardy, colourful (red, blue, yellow, green, orange), breed readily. Start with 10–15.
- Amano Shrimp (Caridina multidentata) — larger, excellent algae eaters. Can't breed in freshwater. Add 3–5 for algae control.
- Ghost Shrimp — cheap, transparent, hardy. Good for testing water quality before adding expensive shrimp.
Caridina species beyond amanos — crystal reds, tangerine tigers — can work in a 10 gallon, but they want stable, soft, remineralized RO water and are a poor first colony. The shrimp hub compares all of them side by side.
Tank setup
Substrate: Use sand or gravel (not soil — soil can cause ammonia spikes that kill shrimp). Dark substrate makes the shrimp's colours pop.
Plants: Lots of moss (java moss, christmas moss) for shrimp to graze on and for babies to hide in. Add floating plants for nitrate absorption. Cholla wood and Indian almond leaves provide biofilm surface and tannins.
Filtration: Sponge filter only — no intakes that can suck up shrimp. The sponge also provides grazing surface.
Water parameters: pH 6.5–7.5, GH 6–15 dGH, KH 2–8. Temperature 20–24°C (cooler is better for Neocaridina). Avoid copper — it's lethal to shrimp. Check any plant treatments or medications.
Feeding
Shrimp are scavengers — they eat biofilm, algae, and detritus. In a planted 10 gallon, they may not need additional food at all. If you do feed: shrimp pellets (1–2 every 2–3 days), blanched vegetables (spinach, zucchini), or specialized shrimp food. Overfeeding is the #1 way to crash a shrimp tank. Remove uneaten food after 2 hours.
Water changes and molting
Shrimp shed their exoskeleton to grow, and a failed molt is the most common way a shrimp tank loses occupants. Two things prevent it: stable parameters and enough minerals. Do small, frequent water changes — 10% weekly rather than 30% monthly — matched to tank temperature and dechlorinated, because big swings in GH or TDS trigger molting problems more than any single "wrong" number. Keep GH in the 6–15 range so the new shell has calcium to build from; understanding GH explains what your test is actually measuring.
After a molt you'll find what looks like a dead ghost of a shrimp on the substrate — leave it. It's a shed exoskeleton, and the shrimp (or the others) will re-eat it for the calcium. A shrimp genuinely hanging motionless upside-down near the surface for more than a few hours is the failure case; if it happens repeatedly, stop changing so much water at once and check your GH before reaching for additives.
Breeding
Cherry shrimp breed readily in freshwater. Females carry eggs under their abdomen for 3–4 weeks, then release 20–30 tiny shrimp that are immediately independent. The key to breeding success: pristine water, lots of hiding places (moss), and no fish predation. A colony of 10 shrimp can become 100+ in 6 months.
Frequently Asked Questions
How many cherry shrimp can I keep in a 10 gallon?
Start with 10–15 shrimp. They'll breed and the colony will self-regulate based on food availability. A mature 10 gallon can sustain 50–100+ shrimp. Don't overstock initially — let the colony grow naturally.
Do shrimp need a heater?
Cherry shrimp prefer 20–24°C. In a heated home, you may not need a heater. If your room drops below 18°C, use a small 50W heater. Avoid temperatures above 28°C — it shortens their lifespan and reduces breeding.
Can I keep different coloured cherry shrimp together?
You can, but they'll interbreed and the offspring will revert to wild brown colouration within a few generations. If you want to maintain specific colours, keep each colour in its own tank.