Pictured here is a large can of Spirulina Flake Food which I feed my tank frequently. This is an easy to serve food. I just add a few pinches into a plastic cup add tank water and feed it to the tank fairly slow with a turkey baster.
All of my fish enjoy this food.
According to the can some of the benefits of OSI Spirulina Flake are: High Levels of Beta-Carotene, Strong Natural Attractants and Stabilized Vitamin C.