How much do you want to spend? Prizms have a bad rep, but they work great (for the price) for me and a lot of other people. SeaClones, I've heard are getting better, plus there is a mod out there that can make these perform better. Myself, I would go for an AquaC Remora, when the prizm dies on the 29 gallon in the living room, that's what will replace it. HTH