Wtf is this? Help

I just thought of something else. All hoods have reflective metal some are better than others at spreading the light evenly. The closer to the canopy the light is the more likely there could be a "hot spot". This could have the same effect as a magnifying glass and burn the leaves?

It takes time for them to become dry and crunchy but yes. Those brown spots in the pictures will be dry and crunchy soon enough. It's still in the early stage now but the brown spots are well beyond the point of return.

The hood I'm using is a 6in magnum xxxl

greenlikemoney said:

I am not a proponent of flushing, but in your case I think it can only help, not hurt.

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Thanks for your help I really appreciate it thanks.

OnePrays said:

Yeah for potash I'm using big bd by advanced nutes temps avarage from 75-85 60 -65 when lights are off. 1000w hps in apart from plants exactly.

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that would be ur potash man always happenes to me whe i mix top shooter with my nutes trick is to flush old nutes out then feed with straight potash flush then feed it tends to send them over the top just a little

Noticed this on my purple lush, I thought maybe it could be a phosphorus diff. But Im having second thoughts because the plant next to it seems affected as well any ideas on what it could be any help is highly appreciated thank you

I'm sorry I can't give you any suggestions. But that looks to me like there might be more than 1 issue? Something appears to be eating the tip in one spot? Then the brown spots and discoloration could be nute burn like others have already suggested?? I'm only posting because with these added pictures I'd like to say I believe I was wrong because that no longer resembles any light/heat issue I've encountered.

Y

GOLDBERG71 said:

I'm sorry I can't give you any suggestions. But that looks to me like there might be more than 1 issue? Something appears to be eating the tip in one spot? Then the brown spots and discoloration could be nute burn like others have already suggested?? I'm only posting because with these added pictures I'd like to say I believe I was wrong because that no longer resembles any light/heat issue I've encountered.

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Same but after looking around for a while the closest things I could come up with was the phosp deff or I might have fungus gnat larvae. Although to don't see any gnats flyin around but I did have a thrip 2 weeks before flowering

The initial pics look like a K deficiency and the 2 recent pics look like P deficiency....Are you flushing too much? They look like deficiencies caused by a lockout rather than a lack of....
The leaves look very brittle, maybe incorrect pH, or too much salt in the medium.

I've only flushed once when I had a nute burn the coco I use had no salts unless I have some salt build up. The ph is always tested at 5.8-6.0 on average. Usually 5.8. As far as nutes I'm using flora series, cal mag plus, and super thrive.

Here are some more pics

OnePrays said:

Y


Same but after looking around for a while the closest things I could come up with was the phosp deff or I might have fungus gnat larvae. Although to don't see any gnats flyin around but I did have a thrip 2 weeks before flowering

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I've had fungus gnats in the past. They didn't do any damage other than annoy me. They did stick to the buds late in flower though. I really didn't like that. I used azamax and drenched them and that solved the problem. They are real easy to manage.

Yeah I ended up figuring out the problem it was the ph I ended up calibrating my ph meter and it was off by 2.7! So that was the problem but thank ou all for you ideas an help

Wow that will do it! Glad to help.

Didn't look like heat stress at all. Rather looked like p deficiency/lockout, which causes Fe and Zn problems. Also possibly early signs of K def. But since you didn't really change feed, and it didn't seem like a buildup of nutes, I would've suggested pH. But you already figured that out lol.

I suck with deficiencies, but here is an easy to read chart if you keep in mind an overabundance of one nute doesn't just lockout that nute, but also locks out the associated micros.