Took me a while to get the hang of feeding them only what they need. I am still trying to instruct my husband on this art though, as last time he fed my livebearers, it looked like it snowed fish flakes, and I had to do a 90% water change and extreme gravel vac (which sucks because its a hexagon tank that is really tall) and then yesterday I spent about 20 minutes in the cichlid tanks with a net because my husband didn't realize that they only need 2-3 pellets a piece, and he gave them about 20 apiece lol.
Just put an entire turkey on his plate for dinner some night. When he asked what you are doing, smile and say, "Taking care of you like you take care of my fish."