Flow - Rule of Thumb?

[Oscar]

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.