Here is the scenario that I just went through. When I removed my mesh cover off of my pool a few weeks ago to start the season the pool was full to the top of the skimmer. After pumping the debris on the bottom of the pool to waste I proceeded to go ahead and put the multi-port in the recirculate position, as I wanted to circulate the bleach that I shocked the pool with. I put in about ten gallons of bleach, as per the pool calculator recommended. In the next 24 hours the pool proceeded to loose approx. 500 gallons of water!! I immediately proceeded to shut down the pump and went back to the pool and capped the skimmer and all returns to pool. The only thing uncapped was the bottom drain. Over the next 4 days the pool lost another 1000 gallons!! The following day we had a huge storm and the pool filled back up. It stayed full!! I left it alone for two more days and the water level maintained. I went ahead and opened pool back up and started filtering water. I am curious if adding that amount of bleach could have caused such a huge water loss. The weather here has only been in the upper 70s with low humidity. I live in the Louisville, KY area, and I am STUMPED!! Theories or opinions will be greatly appreciated.