I have 2 Rio 1100's, each stated to deliver 1450 LPH, situated on back of 150g tank at approx. 4 inches difference in height with the upper head approx. 9 inches from water surface. The tank has two column overflows. I have the heads directed more towards front and center of the tank.
I have had the tank up for nearly 2 months with about 160 lbs live rock, with a couple damsels, crabs and snails...no corals yet.
My question is do these two heads produce enough water movement?
Should the head heights be changed?
What is the rule of thumb if I wanted low, moderate, or high water movement?
I would think the way I have the heads placed is that I have high movement near the headsand front glass and low near front and center of tank.
Has anyone placed their powerheads on the same end and go for clockwise or counterclockwise water movement? Any benefits positioning this way?
Additional powerheads?
I have read since purchasing them that the Rios do not take well with a wave maker cycling off/on.
Discussion please...



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