Master/Deep Purple def or toxicity??

Hi guys, so I recently went away for 3 days and had a buddy look after my babies, now there is this intervein yellowing and cupping thing thats going on and Im not 100% on how to diagnose it. If anyone else can tell me if this is a deficiency or a burn it would be greatly appreciated Some info: this is my gaurdianView attachment 2813994 I keep the PH @5.8 lately its been going down to 5.6 after feed as opposed to it going up like it usually does, this isnt a problem cause my tap is PH 7 so I just top off my res and its all good. View attachment 2813993 There in the middle of week 2 right now my PPM started @ 1180 this week and from feeding and topping off it has gone down to the 900s

The recipe for success is my AB nut + Algen Extract, Superthrive, CalMag, Liquid Karma, Sweets, Orca, Multi-Zen, Nitrogen Boost, and Amino. I also add Snow during the last 2 feeds every week.

These are both strains I have never grown before the Master has 3 leaf sets but gets 5 and 7 when it matures, The Deep Purple I havent seen more than 3 leaves sets on any of them, I think this is a non-issue though.

Here are my problem areas
View attachment 2813991View attachment 2813985View attachment 2813990View attachment 2813987

If anyone knows what these burns are from please lmk so i can fix, Thanks!

Looks like a deficiency... is there iron in any of your plant foods? Did your buddy watch the pH diligently?

yeah he checked up on it it was at 6.0 when i came home so not too bad. I foliar with a iron/zinc supplement but im not sure about the others there might be in some of the organic stuff like the karma i should go check