Powerhead ?

[Csubseball]

I ordered 2 Seio's for my 125. I have never had a tank this large before. What the rule of thumb, or how does one decide where to place the seio's in the tank. I was thinking of putting one on each end facing in-ward, and one on the back wall facing the front of the tank. Does this sound alright, or a bad idea?
Any pics would really help out as well.
Thanks

 

[bertoni]

A lot depends on your live rock setup. That sounds like a good starting point, but you'll probably want to tune the placement to get flow over all of the tank.

 

[mg426]

Agreed sounds like a good starting point. you will most likey have to change something around a bit, but it sounds like you are in the ballpark.your corals will let you know when you got it right.