Hello. I hope someone can give me some insight to a problem I've had twice now. This is a new pool filled on 7/14/10. New Merlin solid cover stretching over the 18" raised spa with pillows to cover the gaps on the side of spa. After the latest rain storms my pool has filled up 5-6". It has a Merlin solid cover on it. I checked it a week and half ago and the water level was fine at that time. It was about 3 inches below the tile line. Today I flipped back a corner of the cover because I suspected it had filled up as I could see the pump on the top of the cover swaying. Sure enough it is almost to the top of the tile. That means it has filled up about 6 inches. We got rain this week of about 3 in. The raised spa also filled up about 4-5 inches. This also happened in the fall when we had a lot of rain and the people who closed the pool said it must have occurred because of the cover. They spoke with the Merlin rep. and he said on new pool covers this can happen until all the stitched areas "fill with debris" and clog up the tiny holes. Sounds like BS to me. But, why would the spa and pool both fill up? The water is also brown. It only happens after large amts. of rain. Could there be a problem with the pool? Cracks? Any insight you have would be greatly appreciated.