@jthornton , thanks for you updates. Have a few comments/questions for you.
I hope by "tossing out trays" is that you mean the moldy trays go straight to a compost bin, or somewhere the worms can at least eat the fodder not fit for chicken consumption. Since I only grow fodder in our winter months, there is not much I can do if I got a moldy tray of fodder not fit for the chickens. So it would just get tossed into the pallet compost bin, where at least it would eventually be composted. Otherwise, I think I might be able to bury a moldy tray of fodder into the chicken run compost system, where the worms could eat the fodder and at a later time the chickens could dig up the worms and eat them.
OK. I am trying to follow you here. Did you find that your well water PH level was going too low? I think you stated your goal was to have a PH level of 5.5 for growing fodder, and that you were using some chemical called PH Down to reduce your well water PH level from 7.5 down to 5.5. If I understand you correctly, your well water PH level has gone down from 7.5 due to spring rains so you had to reduce your chemical additives that lowered the PH level.
I am trying to understand exactly what you are doing, first of all because I find it interesting, but secondly, I also have well water and I wonder if my water PH level changes through the seasons. I had not considered water PH level for my fodder system, but you seem to indicate it makes a big difference. I think that is important.