Wannabe Guru
Join Date: Jun 2007
Location: Tsawwassen, BC, Canada
Posts: 1,419
Shrimp, and a couple ottos. 5gls is the empty volume. Throw in the substrate and hardscape and you're down considerably, also, certain fish, Celestial Pearl danios, do alot better in a bigger tank (10gl). I had them in a 5gl at one point, when I first got my hands on them, they just hid the whole time. Moved them into a tenner and they were out and about. Harlequins are schooling fish, and need minimum six (and thats not even a school, ha) and that is by no way going to fit. Same goes for the Neons.
When a tank is of that size, parameters fluctuate considerably more than a bigger tank. If I were you and were wanting an enjoyable nano experience, I would stick to shrimp- very curious, very entertaining and fun to watch...and they help fight the algae.
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