Hi everyone...I'm new at this ag ground pool stuff..so here goes...living in Florida, especially during the rainy season...I usually have to siphon water out. It fills to the brim. This past week we had nothing but rain down here, something about a "front' moving in. Wow...so much water everywhere and my pool looks like it was going to burp. It's pretty much back to normal and down to a lower level, but when that rainy season picks up, guess I'll be siphoning again..but is it really necessary?