Who Gives A Fish Forums

I use pool filter sand in my tanks and it's been a game-changer. No issues with clogging or anything. Got a great deal on it too - 50lbs for just 14 bucks. I've got a 55g tank with the mystic white stuff and a 20g with the light brown kind. Looks pretty good, if I do say so myself. Plus, cleaning is ...

A pair of Kribensis could work well in a 20g, but you mentioned wanting a species where you could keep more than a pair. If you're open to shell dwellers, I've had some experience with them.