Stop using H202. It is NOT a good oxidizer (unless at pH of 2.0 which is not advisable for good plant health) and is NOT killing the pathogen organisms that are alive and thriving in your DWC system(s) and thus killing your root systems (and your plants). H202 also strips nutrients out of solution (forming unusable precipitates).

Pulled this from a blog by a big west coast hydro shop. I've never liked using h202 on plants. You're girls are lookin good though. :jointsmile: Keep it up!

edit: that room temp is too low and you're res temps still just a bit too high. :stoned: