If you are making home made feed for aquarium fish, don't be so sure your feed formula is really doing your fish any favors. In an aquarium, feed MUST supply every essential element needed for health and growth. Aquarium fish can not forage and eat incidental items that provide the trace elements, vitamins and minerals.....it is included in commercially made "Balanced Diet" feeds, as I mentioned in my earlier post. Just like feeding Big Cats in zoos only skinned meats, they often get rickets and other vitamin deficiency disorders...they need skin, bone and dirt from their kills....