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					Originally Posted by parkinsn  I found that the more flow the better. My LPS would sway in my tank with a mag 18, koralia 2 and 3 aqua clear power heads i had in my tank (120g) and i added 2 koralia 4's and a koralia 3 to my system, and my LPS still sways about the same they just have to adjust to the amount of flow you put to them | 
	
 OK, so here is my summary of your flow:
 Mag 18 = 1,800 gph
Koralia 2 = 600
3 X Aqua clear = 3 X 400 = 1,200
2 X Koralia 4 = 2 X 1200 = 2,400
Koralia 3 = 850
=6,850gph / 120g = turnover of 57 X
Are the assumptions correct?  
You probably have less than 120g of water so the utrnover would be higher.