I just put in a new overflow on my 75 gallon. I purchased a 1500gph overflow kit from
www.gla ss-holes.net Everything was going good until I noticed that one of the bulkheads was leaking. I tried to take it off this AM to seal it but I cannot get it off. I cracked the overflow in the process, not bad but enough to really irritate me. So now it looks like I will not be able to get it off short of breaking the whole overflow kit.
Is there a way I can seal it using a putty of some sort? Note this overflow is on the top left hand side of the tank not at the bottom so there would not be a lot of pressure.