GH Seeds Jack Herer 600w indoor Grow -General Organics Go Box- Burn? CaMg?

Hey all,

I haven't posted on this site in years, but let I have an issue with a new line of nutes (presumably), and was wondering what people think. I usually use FFOF and all the FF nutes, including the granular ones. I used RO water and adjusted pH religiously. I decided I wanted to try something new, so I asked around and my local HTG shop employees among other people suggested the General Organics Go Box. These are my first plants with this nute regimen.

There is some burning/yellowing on one of my plants. Both are seeds from GHSeeds, both are Jack Herer. The one I am having a problem with is planted in Roots Organics 707 blend (new to me as well) amended with additional earthworm castings, Roots Organics Uprising, a bit of Peruvian Seabird Guano, and some additional perlite. I have been using my well water which is about 7 for pH, and has no detrimental amount of tds or anything. The plant you see is on week 6 of flower as of today. I am wondering what could be causing the discoloration. If you'll notice, the entire plant is somewhat pale it seems. Some other facts about the grow:

-Other plant pictured was a mother I just put into flower. The pheno seemed better so I kept that one. This plant has NO known issues.

-NUTES ARE GENERAL ORGANICS GO BOX LINEUP
-600w HPS with big kahuna reflector.
-40% RH
-4x4 Tent
-Supplemental Co2 (no controller, just manual applications)
-avg temp near 75F
-424 cfm fan pulling over light and other supplemental fans
-both plants were LST'd

Any input would be great. Thanks in advance for looking.

Not sure how long flowering is for this strain, most sativas are a little longer then indies for flowering. if it's an 8-9 week flower time then the lighter coloring is normal as you would be nearing the end. what % is the milkyness of the trichs?

They say it's 8 weeks, but in my experience the flowering time is always longer than they say if you want it to actually be ripe. At any rate, I haven't a clue on the trichs as of now because I know it's not even close to being done. Most pistils are still white and the calyxes haven't really even begun to swell. I am also concerned with the leaf edges, only because I was under the impression organic nutes (this kind anyway) could safely be doubled with no problem. I didn't double them just did recommended dosage. Maybe my soil mix was too hot...

Let em run, you'll know when they're ready. Happy grow!

i run GO and have found that the heavy feed amount is too high for most strains. For bloom I tend to use somewhere around 12-14ml per gal, maybe 6-7ml per gal of biobud. I religiously use cal/mag with every feeding, but I'm using R/O. I also figured out over time that GO works better with an additional load of fulvic acid. Pretty good stuff for how cheap it is.
Could have been the soil mix, but I would have thought you'd have seen evidence of that earlier. Personally, I use a pretty bare medium that is lightly amended with my compost, more just to get the beasties growing. Not being pre loaded, I can start right into feeding without worry about something time releasing.. I used to use FF and will never go back. The taste difference is noticeable.

I just finished harvesting a jack herer, it looked a lot like yours at week 6. I chopped it at day 69 and it turned out great. It will be pheno/environment dependent though.
Tough plant, it was one of the more resilient. Looks on track to me, enjoy the smoke

Update: 2nd plant that was originally a mother is now 4.5 weeks into flower. My leaves are looking pretty funky. Any ideas? I can't seem to stop this from happening. I have not been adjusting pH as General Organics says not to using the Go Box nutrients. I was thinking of flushing, but wasn't sure if it would mess up all of the active microbial life that make organics flourish. Any ideas?