Works great on our aquaponics fish tank. It does get jammed with lager pellets, the servo is not strong enough to crush them when they get stuck in the auger.
I only use flake food and freezed dried shrimp. Doesn't jam.
I also took the electronic board out of the servo and just used the dc motor part. You might have more power with the servo set up this way. I haven't tried pellets yet with mine this way.
I designed it if for flake food but glad it was able to work for you. Looks good.