I was wondering what you guys thing i would need for flow for a 65g sps dominated tank? So far I have one MP10 and was wondering if I should go with another one or get 1 MP40
Whichever you can get a better deal on. You could use the 40 as your primary flow pump, with the 10 set on a random mode to create variable flow patterns, or run them in anti sync to get good cross flow back and forth in the tank.