After having endless issues with BGA I'm trying to eliminate any possible issues- dosing macro ferts and trace elements, aeration and also water circulation. I'm running a JHW-303B external canister which provides some water movement at one end of the tank but it doesn't quite reach the other side creating a sort of dead spot which also allows sediment to settle on the substrate. I've been considering a powerhead and have heard great reviews for Koralia so went to buy the second size (apparently 600gph works well) before I realised I'd also have to buy a wavemaker. My question is, is it really worth spending hundreds on a powerhead just for a freshwater 55g in your opinion? Or are there any more affordable options for circulation? My tank is planted with angels and tetras do I really don't need too much power. Thanks for any input