Overflow box question

[TankZombie]

I finally got my 180gal with dual corner overflows up and running, but to keep my water level in my tank where it's not to high I can only go around 700gph my drains have no problem keeping up with a faster flow but my box's can't handle the increased flow the water level rise's in tank to high.

 

[mcgyvr]

Welcome to the corner overflows suck club...glad Im not a member...there are plenty of you though..700gph is enough...be happy with that..

 

[nereefpat]

I agree 700 gph is plenty.

If you have 2 holes in each overflow, you can convert each one to a Herbie. Then run a return or two over the back. It can handle more flow and be basically silent that way.