burnt tips

Hi everybody, my plants need help!

Two plants, bagseed, hydroponic setup, indoors closet, advanced nutrient grow/micro/bloom liquid ferts, 1:1:1 solution, 110 watt florescent fixture, 18/6 light cycle, two weeks into grow.

Here's the problem:

The tips of the largest oldest fan leaves are going crispy a few days after nutrient solution is changed.

Any ideas?

mine is doing the same bruv,
the only thing i no it could be is light too close or too hot!
it aint a bad problem but u dont want it burning the plant..
how close are your lights???

Have any nutrients touched the leaves because that sounds like nute burn to me .if the yellowing is crispy i would say nute or light burn.if it is more of a droopy kind of yellowing nutrients.your plants still look young dude there not on full strenth yet are they if it gets any worse i would say it a nitrogen deficency.

Kinda weird, they're extremely healthy and growing fast, I just clipped the burnt growth and everything is looking good.

Hopefully all remains well.

Looks a bit warm in there too, see the leaves curling at the edges lengthwise,
they're trying to conserve moisture.
Also as was said, could be nute solution splashing on the leaves.