Trouble on the home front. 3 of the 4 bulk heads that Frank's Tanks sold me do not have threads on the inside. SO, Bill had glued PVC and tried to use compression fittings. No matter how tight he gets them they leak. I have to try to find three 1" bulk head fittings with threads on the inside tomorrow. (Just drained out all my good aged water into the shower) In the meantime my plants remain in the bin and my filter remains filled with water and bacteria that I'm afraid is dying. Not sure where to go tomorrow but I'll get on the phone in the am and take one of the fittings with me. What a pain!