We had 10 inches of rain last Friday night, while we were out of town, and when we came home on Sunday I had several thousand dead earth worms in the pool. It smelled like a swamp! I really wish I would have taken pictures, but I was too ****** off at the shape of my pool to take any. This was my first near disaster with our pool. Luckily with my TFP knowledge I knew how to react and fix the issue. In less then 24 hours I had a clean clear pool. BTW - I am not joking when I say we had thousand dead worms in our pool. It was beyond gross! If anyone knows how to keep them away please speak up!