along the years I've used pretty much all of them. For salwater applications I like the marineland or hagen's for straight power heads, but for wave motion you have to get a wavemaker of some kind, so the nice answer is the power sweeps. Yes, they do get stuck pretty much requiring bi-monthly cleaning to keep them from sticking, but none the less work great. The hagen's tend to be a little noiser, and the marineland's tend to need fresh impeller's due to the saltwater causing more friction I think. Anyway, it's all good.