I have a 55 gallon tank with an emperor 400 on it and it seems to create a pretty large current which is moving the plants quite a bit, which I've heard isn't good. If I slow down the filter then there won't be as much filtration. So I'm wondering if it would be best to get another emperor 400 and have two on boths sides of the tank and then slow down the filter. I could also get a canister filter but I'm not really sure what I should do. Does anyone have any suggestions?