According to ADA's website, FISH FOOD AP Series contains richer nutrients and suits the taste of fish. This avoids the deterioration of water condition caused by leftovers food and fish waste. With this advantage, one can feed without worrying about algae appearance.
I am pretty reluctant to try it at fish as I have been using Tetra Color Pro. My friend pass me some samples of this fish food thus I don't mind giving it a try. After trying for a week, I realized that this fish food does not create a layer of oil in my water surface like other fish food. In addition, since AP1 is available in a smaller package compared to Tetra Color Pro, it is pretty ideal for my tank as I have less than 20 small fishes.