Leaf tip bent down

[coralman]

6 cheese bomb in 5gallon pots day 15 of 12/12 and day 8 of showing flower.

Leaf tips are bent down, they were fine yesterday so happened overnight.
From what i understand the only thing it could be is nitrogen toxicity but i last fed them 10 days ago with 2ml/l of fish mix and theyv been fine inbetween, they then had plain ph'd water 4 days afterand then fed yesterday with 1ml/l of biobizz bloom and top max 3litres each with a bit of run off so i dont think its nitrogen???
They had a few hours of temps hitting high 90's 2 days ago but had no cupping of leaves.
Could it be the bloom nutes?

Im Stumped haha.

 

[coralman]

Ph of soil is 6.8. Thanks

 

[Weaselcracker]

Are you in soilless, or in soil? If so what type of soil? Do you have a reliable ph tester?
High ph can cause lockout of many nutrients but still allow full access to nitrogen, causing the same N toxicity symptoms as if you overdid the nitrogen.

 

[coralman]

In Soil with a decent ph kit.

 

[bunkbudz]

A few leaves look to be canoeing up, which could be heat stress or the lights are too close.

 

[coralman]

had a closer look and there is very slight cupping so it could be the heat stress from last 2 days, ambient temps have dropped so temps are between 25c-28c now, will the leafs correct themselves or stay like that (if it is heat stress)

 

[Weaselcracker]

No the leaves won't correct themselves.

 

[coralman]

so im stuck with pointy down leaves haha i can live with that if my ladies can