so im not too sure about the size of my mud pond but it took almost 12 hours to completely drain at 200 gpm. per MINUET.....anyhow alls drained now and all indigenous species of fish are gone and my large koi pulled. we are currently in the process of redigging and getting all the mud out and the pond will be about two times bigger.....im worried about having to seine that sucker when its time. I'm actually just going to fill it up and leave my koi in there for a long while to grow out before deciding to put them in a display pond since im moving to the city and all my dad will have to keep up with the feeding and such. heres a bad picture of what it looked like this morning. i will have more pictures up soon. ok im babbling....