Thanks Rachel but...
If I already feed my fish a quality food they eat and assuming they eat it all, do I compare the dry weight of this food to my current one. For example, 1 oz of my current food to 1 dry oz of this food?
I buy my flake food 1 lb at a time mail order. Pellets for bottom feeders, I haven't found one in bulk that I really like so I still buy that from the LFS.