I was doing a 3 month cleaning on my system and noticed this strange growth after taking off the jet plate. Seems like some sort of algae growth.
I also noticed little "worm-like" particles in the water. Not sure what this is, I am using Distilled Water + Daz Mode Protector: https://www.dazmode.com/store/product/dazmode_protector/
I've cleaned my rad before initial setup and this is the first cleaning of the system.
Guessing I should try Kill coil in the loop?