It isn't scum, it's a mosquito dunk.
Thanks for the advice. I'll record the ppm then lower all the nutrients. I'm worried that the roots won't grow without the water feed, because I can only stop by to care for them once every few days. I don't know how else they would get the nutrients that...
ppm of the water before added nutrients was 225.
I'm not sure what the res temp is but I think it's between 66 and 70. I can't check on it today, but it's in a cool basement.
The foil is there because algae began to grow, and the easiest way to kill them was to cut out their light.
This is my...
Has ANYONE seen this problem before? I've done a ton of research, and have never heard of anything like this. It's definitely not root rot or anything like that.
Does anyone know how to fix this? I thought the roots were supposed to look more like a mop coming out of the net pot...