I use a "Aquachef" made by Current. This is my second one (1st one died after about 5 years). They are only about $25 so are very reasonable. Just crush the flake food up into smaller particles so they feed through the system as it rotates. You can set up to 8 feedings a day with mutiple rotations at each feeding (you can set it) to feed as much as you need. This is my primary way of feeding my tank...