Hope all goes well with your next run,
couple things that I have noticed while experimenting with the MPB's...
1. I dont pull out branches with a cage to try and create more growth, this stressed my plants enough where yields went way down. I only use a larger cage, about 3.5 feet in diameter, to support what naturally grows.
2. Heavy flush is a must each week, I drain my system add fresh tap water and run it for 5 hours drain the system and add pre mixed nutrient water back to the system for the week. I have never had rot and have never used any hydro fungicide.
This has been what I have observed after a couple runs with the MPB's hope it helps.
Good info, thanks for sharing that giddeon.