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Unfortunately it was probably the miracle grow perlite that messed things up for you. It is not inert like most perlite, it has trace amounts of nutrients in it. I found this out the hard way also when I almost lost a whole batch of seeds. I decided to check the EC of the water and it was around .6 - .7 not at 0 like I would expect. I never paid attention to the bag because I assumed miracle grow perlite was inert and they were just using the name as a selling point.
with the look of those pictures this might be they're grand finale. They look TOASTED. if you want a chance to save them get them into some good organic soil, potsize around 2 gallons each atleast... Happy frog or something along those lines.. From the looks of it, it might be too late.
I don't know how stable that auto AK47 strain is, if it is worth making seed from it. But just to tell you that even the tiniest AF can still be used to make seeds with them.
For me it was a (after 12 weeks) 5cm small Lowryder2 that gave me 6 good seeds.
(But Lowryder 2 is pretty stable, so I can expect those seeds to grow to what I want)
I am growing some ak right now too, just about to harvest, but I stunted them a bit with transplanting a little too late and I know my yield was affected. Will transplant as soon as sex shows next time. I have to start in smaller hempy cups because of space. I realize that starting in finishing container is best option, but dont have room until I weed out all the males. So have to start in smaller cups.