hey all, today i awoke at 5am to find half my pond caved in. we had about 3 inches of rain in an hour. a ton of sand and water were trapped behind the liner causing a huge bubble. this shortened the liner by a foot or so and it would not go to the top. pond water was leaking behind the liner. what a mess. i removed over half the water before it stopped filling from behind. just yesterday I lost one of my fish. my water was good as far as i could tell. ph 7-8. amon nill, nitrate nill, phosfate nill. everything looked good. i added dechlor to the new water and salt. one of my 15 inch butterfly is not moving . he had been in the same spot for hours now. i am very worried he will be the next to die. he did eat a little and swim in the same spot. the other fish are acting as normal. i wish i was having fun, this is very upsetting. any thoughts ? thanks in advance.