
Hey I need help ASAP, my roots are COVERED in brown shit, idk if it's because of the dark brown color of my Rez, but it looks horrible. Plants look healthy still though. I added hydro guard yesterday. Just added some cold water to lower Rez temps. Air stone working good I think...
How much water am I supposed to have in the rez compared to how far down the roots hang from the net pot??? I have the water all the way up to the bottom of the net pots, with the roots all fullysubmerged in the water

This is with the lid up for the picture, of course the water is actually a lot higher when the lid is in place. pH at a nice 6.1