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Yellow crispy wappa. Need help.

Hello everyone,

I'd like to hear any helpful advice. The story so far...
4 seeds, germinated in jiffy plugs on (the grower knows some growers do not like them, but I had no issues), Jan 1st the grower started veg under a 125W Blue CFL until Feb 12th (44 Days of Veg) then change to 18/6, under a 600W HPS when the appropriate leaves start to come through.

Using Bio Bizz All-Mix (Its hot, so no nutes for first 3 weeks, started with a very low dosage of Bio bizz Grow.
Started getting yellowing, so flushed with PH'd water (6.5), previously the grower had used tap water that had stood for 12 to 48 hours, but discovered the PH was at 7.5, the grower really didn't think they had to worry about PH for an organic soil grow.
After the plain water 6.5 PH water flush the grower watered 3 days later with weak Bio Bizz bloom and 3 days after that (having seen no improvement), then watered with PH'd water containing Bio bizz bloom, cal/mag and Alg a Mic (5ml, 2ml, and 5ml respectively) and just did a foliar feed with alg a mic before lights out.

The grower does not know if its N def, too much N, or calmag def. Should next step be to just flush with clean water again and just use that for longer? If its N Def, would that make it worse? Hopefully the photos will help.
 

Attachments

Standard nute burn to my blog and flush: https://www.rollitup.org/blogs/blog32237-flush-baby-flush.html
You are correct as a soil grower(organics) there is very little you can do with Ph, as many discuss various methods to fiddle with Ph by measuring the runoff, still a very poor indicator, you have done well, flush again as per the blog, no nute ever until you see a positive rebound
Major league thanks to you all for getting back, much appreciated. Vostok, I read the blog on flushing and will go down this route, just one question on that, should plain water defo be used? Could/should a weak 1ml to 2ml per litre of grow go into the flush? Also, should the flush be done at what would have been the next watering, or just done right away? Cheers, Mr I.
 
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