Root Rot?

[ratagatz]

Indoor.1st time growing hydroponic! Only 2nd grow. First grew in nice soil. Got spider mites! Couldn't kill em! Ruined the plant!
Seed is 1:1 CBD:THC Auto flower. Started in wet paper towel Feb 1st- Feb 5th sprouted, put in rockwool cube and into grow room with humidity dome and heat pad, 75F.Popped out of cube feb 7th. Feb 17th,Put seedling in Hydro bucket, LED Light at 30inches and 30%.Temp 70 degrees F. Humidity 40%- .-Keeping PH close to 6 -
Feb 27th, change water and nutrients (Technaflora) with Hydro guard! Noticed a bit of brown on the little spindly root Added a tablespoon of hydrogen peroxide with next change . She seems to be growing nicely. Is this (picture) Root rot or just discolored from Nutrients? and should I trim more to have less but bigger buds?

[Cloud]

Hard to tell from blurple lights but a little root rot won't cause issues that quick. More than likely its ph. You said you keep it close to 6. Let it swing between 5.5 and 6.5 so it can absorb nutes better.

[dilvish]

It looks a little dark, possibly nitrogen toxicity...dial up the light and dial down the nutes and see what happens