You can't go wrong with the Remora!!! I would be hard pressed to put any other brand of skimmer in one of my tanks. I have tried others. CPR is good, but not as good as the AquaC's. SeaClones and Prisms are not worth their weight in plastic. If I had the $$, I'd go with Euroreef, but that is a pricey option and a little overkill for a 30.