bigburner said:Thanks guys- INVERTED cover that sounds like the ticket. I have a make -up water float/valve I plan on sticking in there also. I need to keep my tank 100% full so I don't get the water line rust thing going on, I may extend the manway up a little so the water level change stays in the manway.
Full or not, it is my understanding oxygen is still present in the open water system and I need chemicals to treat my water to prevent corrosion.