Thanks, I got the "Two little fishies 150" from Marine Depot with a Mini-Jet 404 --- has max flow of 106 gph. I have 3 inches of Phosban, doesn't seem to be pushing phosban up much in reactor, I have the Mini-Jet 404 adjusted to max output. Representative on phone recommended this size pump. Do I not have enough pump strength. I have read recently that the Maxi Jet 400 is good? Did I get misled by rep?