I believe 20-25% lipids would be a problem for fish. Recall some papers saying there's an upper limit. If work isn't too swamped today may go see if I can find them again. Seems like max 16% rattles in the back of my brain.

edit: Yup, we've been over this:
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=400263

Last edited by DNickolaus; 04/20/15 08:05 AM. Reason: add prior thread