My pond supplier who was a major help in giving me ideas for my in door system along with Cecil raised LMB in a RAS for 3 years. He told me that out of all the fish he had ever raised in a tank LMB were by far the hardest. He said that he had to constantly sort them for size and remove the smaller or larger ones on a monthly bussiness. All was well with the system for 2 years but by the time they were pushing 2 lbs they started acting strange and dying. He said that testing was done on some of them and if I remember corectly he stated that it was due to liver issues which probably stemmed from 100% pellet feeding. He was feeding a trout style food though so that may have been the issue...I don't know??? It was pretty neat seeing him raise them the few times I went into the store and had the chance to see them though! Good luck with the setup! You tank/pool sounds huge! Do you have any pictures you can post???

Ryan