I have a 700 gallon above ground pond with a 4x3 BOG. Today I turned it on for the first time. The bog leaks on the bottom. I have no idea why. I really don't want to try to fix it. I have already spent too much time on this. I want to take it down and scrap it. Replace it with a nice Pressurized Canister Filter. Anyone have have any recommendations for a 1,000 gallon + filter?