POwer head help

[windcoast reefs]

Originally Posted by bignose

I have 2 koralia 4's in my 90G SPS tank.

edit: If you have sugar sand(small particle) in your tank don't go with too much flow. I learned the hard way and have spots in my tank with bare bottom and spots with 3" sand.

Yeah, I am learning that as well. I have a koralia 1050 and a 750 in my tank and everyday I have to move some sand around