Pineapple chunk is definitely the more sensitive strain of the 3 im runing at this time, she has some yellowing in the bigger and lower fan leaves wich i cut hope it will get better with this dose of nutrients.
@Lou_Grows, You're right. It was heat stress, I was pushing the plants as much as I could with a high light DLI and Co2, got very good fast growth around 28/29'C but started seeing stress up around 31/32'C so had to dial it back to 28/29'C.
I run a perpetual grow, the younger plants loved the higher temps but late flower ones didn't handle it well. In the end I've found that 27/28'C with 50-55% RH and Co2 is the best compromise for all the plants at different stages.