Hi I'm new to the site, I just completed my first run without any major issues and had good results. Now in my second run with a different strain they were doing even better for first 4 weeks or so but now I am having a particularly difficult issue to resolve and am looking for help. Plant just completed 7 weeks of veg, though this issue emerged around week 4 and has severely stunted growth in recent weeks. Plants showing exhibiting slow growth, short node intervals, droopy pale leaves show a variety of stress but often wrinkled or blotchy-nutrients being pulled completely from older fan leaves, dark purple stems, some red leaf veins. Young inner growth is darker and lusher. I believe the issue is related to root rot/pythium. I think I was being lazy about draining water from trays after watering, leaving roots exposed to standing water. I noticed this was causing the normally healthy white roots at the bottom of my pots to appear brown and burnt, and some had a fuzzy gray mold or fungus growing on them. Algae has been appearing in my tray water. My initial response was to spray roots with neem oil, clean and disinfect trays and improve my watering/draining practices. I lowered temp and relative humidity slightly to around 65F and 50% RH. When this didn't do it, I popped the plants out of their pots and noticed almost the entire rootball appeared healthy white and vigorous except the very bottom. I pruned away the nasty bits, disinfected my pots with h202 and repotted. The next two days I watered with h202 at 15ml per gallon. Next day added compost tea. 3 days later I began adding hydroguard at 2 ml/gallon. I am hoping hydro guard will do it but am looking for confirmation of this approach/diagnosis. A little bit about my setup, 4x8 tent with 6 plants-3 bruce banner and 3 stardawg clones. I use yellow 2.2gallon airpots with coco coir (60% organic coco, 30% organic perlite, 5% guano 5% EWC). I inoculated with great white, endo mycchorizal fungi, down to earth beneficial bacteria/mycchorizal fungi. I have added compost tea a few times during establishment. I feed with general organics nutrient line about twice a week with RO water that is naturally at about 7.0-7.3 but I adjust with earth juice to around 5.8-6.4. I go by the GH drops to measure pH, but my Jellas temp-controlled ph meter routinely measures about .5 pH high than I think it is so I wonder about my pH. ppm has been reading single digits like 7 or 9ppm so I don't know if that's right. For the first few weeks my pH was naturally around 6.4 so I wasn't adjusting it, so maybe that's when the issue started? I have two 600W LEDs on 18/6 and temp is usually 72F and RH around 60%. I have two exhale 365 c02 bags and filter my air coming in and have good air circulation. Interestingly, I have 2 plants-one of each strain- I set aside as mothers in 3.6 gal green airpots with FFOF that I watered and fed about half as much so they didn't see as much moisture. They are much healthier and larger though they may be exhibiting the symptoms to a lesser degree. They are now in a separate room under a spectrum king closet case 400W LED. I am including photos of affected plant next to a healthy(healthier) mother plant from same clone batch. If the form of the plant looks strange it is because I did a lot of unnecessary LST in anticipation of SCROG that in retrospect feels redundant. I think this is root rot/pythium based on the symptoms and difficulty in fixing, but maybe it is just a general pH problem? or both? Can they be saved? If the hydro guard does not fix it I am out of ideas and will begin to think about taking new clones. Please share any ideas/experiences, as well as any other general input on my setup. I can offer more info/photos if necessary. Thanks in advance.