MM77 I don't remember if mendip actually said so in the thread but he didn't want to pump out the pond for 2 reasons first he would need to somehow refill it and secondly, and I personally believe this was the main reason he was worried that the fish would die as he thought he didn't have enough storage to keep them all alive while refilling the pond.
I can honestly say that I was very surprised about how much he cared about the welfare of the fish. Me being a practical person thought, any that die will not be wasted there are plenty of Thai's around who would willing eat them but mendip was even worried about the time they were out of water while they were removed from the net and carried over to the holding tanks. I suppose he is a geologist so has a touchy feely manner about him, although cyrille seems to think I am a touchy person it is definitely not the seem touchy as mendip is.
So in the beginning he was only trying to pump out the mud and crud from the bottom of the tank which required him to try and keep the pump from getting stuck in there and then tripping out. I have since suggested to him that i can give him an old tractor tube from which he could suspend the pump and drag it around the pump from the shore using ropes. I think he will try this next time he does it.
Afters aying all that he may have been doing what he did because he likes getting into the cooler water during the heat as well as giving the opportunity to get pictures taken in his 'wicking boxers".