Help pls

So I've come across this little issue with 2 of my plants. Can you tell me what this is? The heat issue was resolved but still seems to be curling and spotting. Thanks in advance

Hello @Testhert -- probably everything will work itself out and maybe you just get out of the way and the plants be plants. In the meantime you could share details like what you grow in how you water/feed them, how close your light is, other stuff. Good luck!

They are in DWC (5-gallon buckets) and nutes are just over the 300 level. Ph was high but now within range. Originally the leds were a bit close (18 inches - 1000w) but now 24-30 inches away and on an 18-6 schedule. Added calmg to those 2 for the first time yesterday (1/2 tspn only.)
Since these are on lower limbs, can they be trimmed off if the rest of the plant is better?

Sure, you can trim off the leaves.

The order you mix your nutes makes a difference. My nutes need the CalMag to be added to the water first, then mixed well. In fact, everything I add needs to be added one at a time, to the water and not to each other, and mixed well.

How about your nutes?