Stocking ideas for a 55 gallon tank
- 6 Boesemani rainbowfish + 10 corydoras + bristlenose pleco + 3 pearl gourami
- 2 angelfish + 12 cherry barbs + 8 kuhli loaches + 6 otocinclus
- 20 harlequin rasboras + 10 zebra danios + 8 corydoras
Bigger volume means more stable water, so a 55 is often easier to keep than a 10. Plan filtration for 5 to 8 times the tank volume per hour.
Before you add fish
Cycle the tank first, so beneficial bacteria can break down fish waste. Test until ammonia and nitrite read zero and nitrate is rising, which usually takes 4 to 6 weeks. Then add a few fish at a time, with a week or two between groups.
Frequently asked questions
How many neon tetras can go in a 55 gallon tank?
Up to about 60 if they were the only fish, but most people keep a school of 8 to 20 alongside other species.
Can a goldfish live in a 55 gallon tank?
One fancy goldfish, yes, with strong filtration and no tropical tankmates. Add about 10 gallons per extra fancy goldfish. Common goldfish belong in ponds.