Why is this plant looking like this?

[gubblebum]

Hello! So this wedding cake by Linda seeds just looks a bit sad.

Water feed is bio bizz bloom and grow, in coots mix soil. The medium is around 6.8 ph, the feed is about 6.5 ph.

I cut open the bottom of my airpots and it was bone dry a week ago, watering every 2 days with 2 liters. Now I increased to 4 liters every 2 days. Barely any runnoff still in the 12gal pots. Light is the Fce 6500, 700w approx led which is 12 inches above this plant, 16 above shorter ones.

This is day 38 of flower. Temp is 25 Celsius, humidity 55rh.

What do you think would cause them to claw like this?

 

[sh0wtime]

They actually look alright, might be transpiring alot through the lights being this close.
You could surely raise the fixture a bit, or give em 10% less power and see if there's a difference in the next couple of days.

Other option might be to give 'em 4.5-5 liters, maybe with 45 liter pots ~10-15% per watering seems ok?
I have 6.5 liter pots and I'm watering ~0,75-1 liter with good runoff. I have about 40-45% RH, so I'd be careful in your case.

 

[BongerChonger]

Water feed is bio bizz bloom and grow, in coots mix soil.
watering every 2 days with 2 liters. Now I increased to 4 liters every 2 days
. Barely any runnoff still in the 12gal pots.

What do you think would cause them to claw like this?

Using nutrients I'd be running more waste than that. Roughly 10% pot volume. It will build up over time otherwise.
I fathom to wonder you're getting any runnoff at all?
You've noticed it early. Plants are still in good shape. I wouldn't change anything besides watering to 10% waste using nutrient.
And it's still a good idea to periodically run-to-waste in water only soils too. It's sensible practice.

GL.