Just got my girlfriend a canister filter for $40 on eBay and it says it cycles 260 gallons of water and hour. She has a 20 gallon planted goldfish tank so I guess it will stay nice and clean haha. It's also extremely quiet which she loves because her other on was loud as can be.
Well yeah I guess that's one way to look at it, it's down below, she is moving soon so we didn't get fancy with it, and they have been in there for maybe 2 months and are doing just fine, she bought them off of a website that sells aquatic plants. Maybe it's a different plant I honestly do not know