Fluval 205 Leaking...now what filter?

[Spyd]

I would spend my money on a HOB skimmer if you wanted to do anything. There is really no advantage to the canister. Too much cleaning and can become a nitrate factory if not well kept.

[Kes1221]

Is there a certain size we should look at for sump tanks for our 2 tanks? What amount of rock will we need....