homemade food

The ATO in my nano overflowed the tank, and this is why: Can I feed this stuff to my watanabe angel in my 90g by including it in the frozen fish food mix i make with a food processor? If so, do I need to rinse it or clean it somehow before adding it?

I am getting stuff together to make some food and have not noticed Salmon mentioned. Is salmon used in homemade foods? How much if any? Is it too oily? How about using it to feed Nems?