Feeding Your Fish
Most aquarium fish are small with very small stomachs. It takes next to nothing to fill something that's roughly the size of one of their eyes. If you feed too much you'll eventually have heavy, unhealthy fish and water chemistry problems.
I feed 2 times a week, a little more often if I have fry in the tank. I feed mostly frozen, like brine and Mysis shrimp, plankton, krill and beef heart. These have two ingredients: The frozen animal and water. Sometimes, I'll feed some vegetable biscuits and minced garlic. Flaked foods have additives that extend the shelf life of the product. These aren't the best choice for your fish and the phosphate in these foods can cause algae to grow if the fish don't eat everything. Check the contents of the food container. If there's an unfamiliar name, pass on it.
Fish can easily go a couple of weeks without eating at all, so if you feed just a little, they'll spend more time swimming around the tank looking for a leftover. They'll get their exercise and you'll have a much cleaner tank.
"Fear not, my young apprentice. Just change the tank water."