root discoloration

I started these gals and 3 weeks ago (4 from seed) and can't seem to pin down this issue. Brown spots on the leaves and now discoloration of the roots. They seem to be growing pretty quick regardless of the issues. Any insight would be much appreciated. Reservoir is changed every 7 days with a...

Hey Guys - I have a couple most like super basic questions that the pro's probably know but seem weird to me. 1. DWC FAKE ROOT ROT- the nutes and aditives are often darker in color and the roots will turn the color of the nute mix! So if I mix up my typical 2-2.5 gallon nute mix w a bit of...