Canoeing and yellowing tips on plant

I have 3 plants that I’m growing, all have different things going on but the one that’s growing the best is experiencing canoeing and only the tops of the leaf tips are yellowing. The plant in the middle is just a slow starter but I think she experienced nitrogen toxicity because the leaves were really dark green, cannoeing, wilted, and the growth came to a hault . The one on the right is just canoeing slightly with wilted leaves but only on the top of the plant.
Idk what’s wrong u flushed the middle plant that I thought had nitrogen toxicity, and just been giving plain water to the outside ones hoping this problem would clear up but it hasn’t

My growing conditions are
Growing in ffof
Ph’d water between 6.0-6.5
I started to give ff nutrient trio but stopped because I didn’t know if that was as the problem or not I only have 2 feedings every other watering.
The time I didn’t water i would just add a little seaweed extract to the phd water.
Temps range from 72-86
Humidity ranges from 31%-75%
I have a co2 bag
6in fan and filter with oscillating fan inside
Led mars hydro 144 is 20in away from plant

Here the rest of the pictures.

LighterLit said:

Here the rest of the pictures.

Click to expand...

Some pics without the lights would be nice.

I don't see a problem...just nice purple looking plants in those pics. Now your description tells me you could have a little heat stress along with too hot nutrients working in that soil.

Yeah that was my problem when they were seedlings thatbthe soul was to hot but hey bounced back and just started this problem.

Here some of the left plant with no lights so you can see a little better.

The tips likely from hot nutes.
Also 86° is a little high but they don't look to be heat stressing.
Otherwise they look fine.
Dial back.
Do a straight watering until the runoff is equal to the container size.
Half or even quarter strength with the nutes until they tell you they want more.
They are not hurting for food.

Nice plants