Bought new pump from fish tanks direct. After the problems with them, I hooked it up and the flow was perfect, for a week or so. Yesterday, I found the tank overflowing without me doing anything to tank other than feeding fish. Now all of a sudden, more water is pumping in than is draining out so the tank overflows. I even closed the return flow 50% yet it keeps overflowing. I took the pipes out of the overflow and the water drained completely out. I thought it took longer than it should but the drain hoses are not obstructed, so what on earth is the problem?
I just had surgery o my hand couple days ago and I can't do much but I can't for the life of me figure out what is wrong. Please somebody come up with some ideas. I have to shut the pump down until I figure out what's wrong, but with my injury, /i can't fix anything major for weeks....