madsklz;1876975; said:I've never had any luck with under gravel filters
Hey they're great for beginners.
If you want to play professional basketball
get one of those trashcan hoops and a nerf ball
may not teach you to shoot but if you get board
at least you're not commited.
If you want to do it get a canister and a biowheel.
With power heads attached they do an excellent job of biological filtration. They do have limitations though, just like ANY other filter!