well, i had all the valves pre installed in my tank already
currently, i using md 55 as my return, with tee offs here and there.
When i increase the flowrate of the md 55, the water level raises, causing alot of noises in the overflow box.
To reduce the noise, i tried to reduce the speed inlet hoses flow to the sump. Whenever i do that, there is not enough flow for the md 55, causing the md 55 to shoot out bubbles.
caught in a bad situation.