Would be interesting to run an experiment by weighing/measuring and caging two batches of BG...feed both until 46 degrees, then only feed one. When water temp warms back up to 46 degrees, pull them and weigh/measure again. Keep track of feed and see how much growth they get per feed given. Both cages would get ghe benefit from other things eating the feed...only one cage would benefit from actually eating the feed...

Sean