I only ever had one incident with this, but it was bad. While I was at work my now almost 9 y/o was about 2 and he grabbed a handful of dog food and who knows what else and threw it into my sump. I eventually get a call from my wife that my water is really dark and cloudy and that my pakistani butterfly does not look good. I rush home and find all the dog food and mess in my sump. The pakistani butterfly was all I lost but I really liked it, and it was show quality size.