Currently I have 3 maxijets on a natural wave timer in my 46 gallon. It seems like way too much stuff in the tank. I can use the maxijets for quarantine and making water so I want to replace them with a single powerhead. Tunzes are expensive and a little much for a tank my size. So I'm thinking of getting a seio, but I'm not sure what size to get between the 1100 gph and the 1500 gph. I have a 400 gph (after headloss) return in the top left corner and the seio will go in the top right. I want pleanty of flow but want to leave my sugar-sized sand on the bottom of the tank. I don't want to throw away the 60-70 bucks testing them so what would you guys recommend?