Last bit of follow up information. Got the feeder dried out over the weekend. Got it working perfectly yesterday! Plus, it's survived 21" of rain this growing season, and it's still working! Maybe this AquaPro feeder will work out after all. I've had more than a few problems with this feeder. This latest was obviously all my doing. After replacing the timer, and complete wiring harness and finally tracking down the last leak. (It was coming in the metal conduit for the wiring to the mini solar panel) I may even like this feeder.

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023