The system is basically completely new. -used tank, used pump, new sump.
I am not having issues with the overflow keeping up, its almost the opposite, the air flow cant keep up.
I have however found what I believe to be an acceptable solution.
I dropped in a plain ol' standpipe like Tony suggested. I trimmed it to about 2" below the glass overflow. As predicted it caused no rise or fall cycles. It was a little louder than I would have perferred but it wasnt to bad. Based on this open stand pipe I added an old strainer from a real old Marineland Penguin filter. This caused nasty sucking sounds. Next experiment involved me drilling out the original pvc cap to accept a 7" length of 1/2" ID vinyl tubing and placed it on the Hoffer standpipe, this was really quiet but had a big problem with reduced flow because of the tubing shoved down the standpipes throat. Hmmmm what next?
Stuck the plain ol' standpipe back in, and just for the fun of it I placed the bell from the stockman/hoffer set up (inverted) over the standpipe water inlet so its opening was flush the the standpipe. This amazingly enough caused the open ended stand pipe to be silent. Dont ask me why. But in watching the water enter the overflow chamber I noticed air bubbles going up inside the inverted stockman/hoffer bell, which worried me because the standpipe is only in the adapter enough to hold it in place and could be dislogded if enough air was trapped inside the bell.
I put the bell on the old drilled stockman standpipe and adjusted it so as the block most of the drilled openings. There you have it, I solved the air bubble issue, solved my rise and fall issue and solved my noise issues.
The only problem I could see is a stupid snail blocking off the open end of the standpipe and cutting off all flow, equaling overflowing tank.
I hope vague descriptions didnt confuse any one.
