I have a 125 setup with lots of plants and a heavy stock, filtered by an fx5 and a penguin 350. With a lot of plants though, I don't think the 350 is ideal. I'm thinking about replacing it with another canister. This will result in less gas exchange, more flow, and better media options. Given the inexpensive cost of the aquatop cf-500, I am liking it quite a bit. It is certainly higher filtration, which is good with the heavy bioload. It has a decent flow, good media space, and the uv sterilizer. I think the uv sterilizer is awesome, especially with a planted tank. Can those with experience with them give me some feedback on them? Is my thought process accurate? Any suggestions or tips? Should I go a completely different direction? Any and all advice is appreciated