Ive been feeding it in one of my feedees for a couple days now. They are starting to eat it better this afternoon. I've been feeding Aquamax for 10 years now but if this feed turns out to be as good as everyone says then I'll swap all the feedees to optimal. Aquamax must have changed there formula a few years back cause it isn't the same as it was when I first started feeding it. I used to get 110% relative weights but now is more like 90% to 95% on average.