That's exactly how I store mine. I typically feed about a dime-sized portion every night (we only keep small fish, though). Sometimes a penny-sized. It's now the only food we give the tank, and it still lasts quite a while.
The fish used to be scared of me when I opened the canopy door. Now they recognize when I dip a bowl into the tank for some water to defrost the food, it means feeding time. They circle in a tight grouping waiting for the food to come! It's a dang frenzy. Almost as soon as food hits the water, snails and hermit crabs come out of nowhere to try to feed. Feeding tentacles on corals come out. It's quite a sight.