with the third powerhead in the tank i was pushing near 50x turn over rate, from what i have noticed from my sps with higher flow the corals react by growing thicker , too little flow they will grow up and out but very thin and brittle. by removing the power head cutting back my flow to around 40x turn over rate i am hopeing to find a happy medium. the green stylo in the pics used to have very thin branchs now they are real thick with almost no other visual growth.