I have a 90g AGA w/Megaflow and the accessory kit, which includes what I think is pretty much a durso standpipe... with a sump in the basement, about a 7' drop, and a Mag18 returning water back up, split from 1.5" into two 3/4" returns (one the "stock" return, the other PVC
Fortunately nothing in my diy
sump is leaking, and water successfully goes down and back up.
Problem is the water in the overflow goes down, then rises, goes down, rises, etc., with gurgling sounds occasionally.
Is this due to height of the standpipe? I can't imagine it is an issue with my pump return speed, if it were too strong I would think I'd be overflowing the tank, right? It is not clear to me how high the standpipe should be.
Any advice? I have searched the forum for rising/lowering overflow but couldn't find anything specific to the AGA megaflow w/kit.