Lowryder #2 spots yellowing

i have a diesel strain in an aerogarden 6 elite pro.using b.c. boost, grow,magical,thrive alive red and sugar daddy. i was informed that these were better than fox farm by the guy who worked at the hydroponic store. im on day 19 now with 20/4 light schedule and about 5-6 days ago two of the oldest lowest leaves began to have small brown spots which has now evolved into 7-8 leaves with this and yellowing around the tips the plant still seems to be growing. i read it could be mg or mn so i added more magical and it kept getting worse so for the past 24 hours ive had them on phd distilled water. am i going about this the right way? ive read all the diagnosis i just want the comfort of a veterans help. i will have pictures tomorrow my usb cable is misplaced. also has anyone ever smoked thc bomb or lowryder? i have just germed two of each the diesel was just so i can gain a little experience before killing an entire crop lol. any help would be greatly appreciated

i meant lowryder#2 by the way

still in week 2 and using all those nutes? gotta be burned

you think so? so i just need to flush it and dilute the nutes a bit? she was growing like a weed and then disaster struck. lol that explains a lot so when should i go to full strength?

u say ph distilled water for your aerogarden. that's 7.0 ph. what ph do you usually run?

i add dry acid to drop it to around 5.8-6. i just bought some superthrive and im contemplating using it to help the recovery in a couple days any thoughts? i was going to use 1/2 ml/gallon in a spray bottle

I would flush that res and run just good ole water for a few days. You can add the superthrive to the res-not too sure on how well as foliar spray. dont know aboutt hat dry acid as a down. what type of acid and is it designed for plant/marine life? like is it sulphuric acid? the wrong type of acid may cause buring as well.
can you post some pics? would really help

i flushed them for 5 days in plain water and this morning i sprayed with>1 ml/g of superthrive and transplanted them back into my other ag where i have quarter strength nutes. pics soon as i get my usb cable