White Widow Auto Aerogarden 1st timer

Horrible week ever since Day 12. Hard core learning experience. I almost tossed her & started over but decided that wouldn't teach me anything. So it's pretty clear I caused a Mag defi by leaving her at 5.8 from day 1-12. She ended up almost completely brown by day 13. So did plant #2 in the same aerogarden. I decided to keep going, she "IS" definitely stunted at this point, badly. For almost 8 days she grew NOTHING. Not a single CM, no new leafs. Probably almost died. I corrected the PH to 6.3 for a few days, knowing I now need to use the full PH range, not just hang at 5.8 ish. I also added a 120$ water cooler to the aerogarden, took 30 seconds to install, it fit in "perfectly" into one of the un used aerogarden holes at the top. So perfectly in fact that no light leaks are happening from using it. Dimension for dimension perfect for the holes. Amazon can be good sometimes. Connected the chiller to a sensor so it automatically just 100% keeps it at 66 degrees. I also removed the AeroVoir & foiled up the hot black plastic tops, which absorb heat, that POS AeroVoir was causing light leak, because the entire AeroVoir system exposes the water it holds to light. Can probably just wrap the whole Voir res in tape, but for now I'm just leaving it out because thats too much risk. The results were magical. On day 1 after the above nothing happened much, day 2 no change, but also, no further browning of the leaves, whatever was happening stopped. Day 3 post damage, woke up to her being double/triple in size, triple the leafs & all look super healthy. Quite excited I have to say, even though I KNOW she'll have next to no yield because of my lack of knowledge. Full week of being stunted. Mega-Yikes I decided shes ready to have the brown leaves removed & cut them, then took more photos after. That is on Day 19 ^, The little bit of brown is from the damage caused "before" this started. So that has been there & a small piece of what I corrected. I should've taken some more of the damage, silly me. I only took a microscope one. It is uploaded above, but in an early phase. Will NOT be making that mistake again UGH......Yield on her is going to be shit, but I gained a ton of knowledge dealing with this, so it's worth it. 2.5 months of learning for decades of growing, good trade off. And got her a better surrounding. Shes loving the hell out of that cold water! Next week her nutes get doubled. I should've been increasing that a bit too, she showed no signs of toxicity, so from what I gather is that means I'm not giving her enough/Pushing her hard enough, lol