Originally Posted by Kurt_Nelson
Also have a 46g tank. I wouldn't go higher than a 3. Personally, I'd ditch the Penguin 550 and get 2x Koralia #2.
I use a koralia #2 o my 65g and it pushes allot of water. K2 swirls the water so it's not like a normal PH. I started with ???? sorry so much coralline on the pumps I can't see the make. I think they were AquaClears. those just pushes water straight ahead.
So with the return pump I have 5 PH's pushing water. Controlled by a Red Sea waveMaster Pro.
PS: I plan to replace the others with another K2.