Esshup - I did mentally take that into account, however, since this is a 20+ acre BOW, it has never had any issues like that, it could probably use a few extra nutrients, and I’m not doing this on a massive scale - I figured that the result was inconsequential for my situation. For a small pond, I understand how this could be something to consider. Although I don’t eat fish (isn’t that ironic...), I don’t want to grow unhealthy fish - so are you saying that the AM500 could/would lead to more fat around the liver resulting in unhealthy fish? Just seeking to understand. It seems like I had heard that about the grain based feeds which is one reason that I wanted to change.