So, no spots on any new leaves and new growth is a healthy green, although the 3-4 leaves that already had a bunch of spots seemed to slowly worsen (get dark near the tip, shrivel up partially) then go kaput (the leaves that were affected were the newer leaves that came in around the time the problem started, near the top/middle). The pic with the leaf that has spots on 3 blades was tiny and had the same spots when the problem initially spread.
I'm hesitant to add any more nutes, but with this scare they haven't had any for a bit now. They seem to be doing fine without extra, but I'm worried I would have flushed too many nutes from the soil, and that I should be adding more soon. Wait, then give 'em as they need 'em? Go ahead and give a light dose? I was just thinking some Jamaican bat guano, something gentle, although I do have some General Organics Bio Bud that I have yet to use, since I'm not sure if it's a quality product or not. Anyone have any experience?
Also, does anyone know of a solid autoflowering strain that gets to 18in. max? This constant battle with the lights is aggravating.
Here they are, I know it's only been a day, but I wanna keep a close eye on them.
Edit: I think I forgot to mention this, but when I flushed them with the pH'd water+H202, I also mixed a small amount of organic bone meal into the top layer of my soil, hoping that the flush and the small amt. used would add just enough of what my plants seemed to be lacking without further exacerbating the problem - Nitrogen (slight) & Calcium (a crap ton), interestingly they never really seemed to show Mg def., though i thought the two usually occur together (why they sell cal+mag). Plus, it has more P than N, which is ideal at this stage
i almost wonder if they had too much potassium, which would've caused a calcium lockout. i added the suggested amt. of molasses per gallon, but then i looked up the particular brand of molasses i used, Wholesome Organic, vs. a type of molasses i seem to see most commonly used, Brer Rabbit: 730mg. of K/TB vs. Brer Rabbit's 292mg. of K/TB (also - Grandma's Original: 109.5mg K/TB! i'd have been using almost 7x the amt., though i believe others have used WO with success - just use less) Well, too much K + too low pH = so long calcium.