Leaves curving down but leaf edges cupping up?

Has anyone experienced this before? Thanks

Doesn't look like any burn going on with your tips, may be excessive heat. What's the temp and humidity in there?

Looks like heat and a possible ph issue.

My temp is running between 75-78 and humidity is at 40. My PH has been dropping to about 5.5-5.6 and I bring it back to 5.8-5.9. PPM is at 1600.

Cut the nutes to around 1000 and what is res temp?

Water temp is 69, I have had the nutes lower in the past but then I get opposite cupping because of magnesium deficiency. These are in 4th week of flower and 4 feet tall.

I think they look pretty good. They look like they are about maxed out on nutes though. I think you could cut it back just little

heat prolly

ELRooster said:

Water temp is 69, I have had the nutes lower in the past but then I get opposite cupping because of magnesium deficiency. These are in 4th week of flower and 4 feet tall.

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Then lower nutes and add epsom salts.

I think I will try the epsom salt I have heard that might work. The only other thing I can think of doing is instead of flushing every 7 days Is try and flush every 5 days so I can lower PPM but they would get a fresh load of nutes more frequently. Thanks for the replies

Flushed the system and took a few more pics.