URGENT help needed!

i do NOT see where you guys are seeing "fried by heat"?
Thats fried but not by heat. The medium is loaded with food....the plants under the 600 are doing good ..... the ones under the tiny mars are locked out.
My guess is not enough light and WAY too much food.
in the real world i have grown in 100f at 40% RH and thats not gonna "cook them" as you guys would say.....

its NOT heat damage,..... There are zero signs of heat damage in there....

getogrow said:

its NOT heat damage,..... There are zero signs of heat damage in there....

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Maybe its a combination of couple of things. Today I flushed the big one and the run off was 6.8ph. Also the runn off was quite clear and not so dark/ yellow as I used to have be4. I will start feeding her again and hope she recovers.

Looks like a pH issue to me, along with some deficiencies which can be a byproduct of a ph lockout. Enzyme products like SLF100 or Hygrozyme help keep roots clean and healthy, even when feeding with organic inputs like guano.

I ALWAYS recommend confirming input pH before watering or feeding.

HydroKing_87 said:

Looks like a pH issue to me, along with some deficiencies which can be a byproduct of a ph lockout. Enzyme products like SLF100 or Hygrozyme help keep roots clean and healthy, even when feeding with organic inputs like guano.

I ALWAYS recommend confirming input pH before watering or feeding.

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Oke so I had to throw away 3 out of 5 plants. They looked like shit. I continued with the ladys you can see below in the pictures. I have the feeling they are not doing well. Check pictures below, yellowing small leaves on top and really small buds (4th week in flower now and they barely streched. I have the feeling they are not having enough potthasium. I did a run off check 3 days ago and it showed run off PH of 7.4... this should not happen because the organic soil PH shoud be regulated at 6.5.could this be potthasium issue due to high PH??