Help, can't figure this out

[Coleus]

Originally Posted by bvlester

your return pump is pushing more water back to the tank than the drain can handle chock the return pump by using a ball valve. then you can adjust the flow additional flow in the tank should be done with power heads.

Bill

I have the ball valve so i already reduced the flow and use power head to get more flow. But the one thing i don't understand is i never got a chance to witness this happen. It happens like 20 minutes and then it back to normal