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The highest ever recorded is 27, I run it at 24.5 with a controller set to operate the cooling fan as soon as it gets to 24.8. What would you do as far as defoliating is concerned? Remove all the fan leaves?

Thanks for everybodys help with this. The problem seemed to be caused by the lights being too close. I raised them up and continued feeding as normal and I am having great results here is a pic from 3 days ago

They certainly have elements of that. With the colouration, clawing and generally cabbage looking appearance. What has caused the various burns? They're all over the leaf edges, tips and in random spots I don't know of anything that would do that

Do far I have eliminated the following Root rot \ root problems in general Pests PH Heat stress Humidity What else is left?

Indeed, would it be advisable to do a light foliar feeding of CaMG with a small amount of P and K? Say 500ppm? That way I'm not causing them to develop other deficiencies by cutting off all nutes for the sake of not adding any N.

Pics as of 5 mins ago

Ph is 5.5-5.8. Runoff is regularly as high as 6.4 though

650-850 ppm every other day. They're big pots and stay moist in that time so no water is given between feeds

Do you think that's what it is? It doesn't look like textbook N toxicity to me. . as I understand you don't normally see the burned spots, tips and edges that I've got with a surplus of N. Also they have not been ODed on nutes by any means they are only on 650-850ppm feeds which is why I'm...

It was zipped up, or do I thought, it turns out one of the zips from the bottom was broken. I sewed it back together. No resolution, they aren't looking any worse in terms of tissue damage but they are clawing more. Any suggestions as to what I can do to get them back on track?

I don't know how it happened really, The girls are in a tent in a garage. Maybe they are getting in from under the garage door?

Thank you very much for all your help

I haven't got any other media and I've over spent massively on this. The funds have run dry. I need to make the coco work. I'll take your advice and leave it alone for a few days and water with plain phed water on either Sunday or Monday. After that I will resume feeding every day with a light...

No slugs, no gnats. No problems of any kind. I can't think of any reason they would be in such poor condition

I thought the same thing so investigated. No such issues, I'm absolutely baffled

OK, I will do exactly that. If it is not slugs, what do you think the problem is?

I really am at a loss on this as I did my research thoroughly before I started. I've maintained optimum ph levels, temperature, humidity, and I have fed them with nutrients specific to my medium in the basis of low ppms little and often making sure the rootzone never dries out. Up until the...

Thank you all for your help so far, how do I go about giving the roots a thorough checking without causing the plant additional stress? I've got quite a lot of medium to sift through in order to properly check it. Also if it is slugs feeding in the rootzone how do you suggest I deal with them?

All from seed, incredible bulk, dream machine, caranelino and northern lights

I have been feeding 2-3 times a week with a total ppm of 650-850.