[Grateful D]

So all the sudden my leaves on my plants look like this. Happened almost overnight to 2 separate tables with 2 separate rez’s. One table is 5 weeks in bloom, the other is 2. I use GH Base nutrients with their feed chart at about 2/3 strength, with Advanced bloom boosters (overdrive, big bud, bud candy) at half strength. Also I use terrpantor. I use water ph’ed to 5.8 any advice would be appreciated. Thanks

[Grateful D]

Maybe a case of heat stress, just checked my controller and it said my temps maxed out at 86.5 and this issue doesn’t seem to be affecting the couple of shorter plants I had on the table or lower leaves

[Only Ornamental]

Only/mainly older leaves? Then it's likely magnesium deficiency. That one can occur quite fast and results in interveinal chlorosis.
Got other pics including whole plants and other (different) leaves?

[Bilboscrogins]

^^ x2

[justanotherbozo]

...i'd say heat stress is unlikely, 86.5 ain't nothing, just a little warm.

peace, bozo

[Dog Star]

Mg