Is this light burn

Hi guys/girls this is my first grow, using t5s for veg and now 600w cool tube hps for flower. Currently on week 7 of flower and growing crown royale, the 2 plants directly under the light have reduced crystal production and over all look a lot lighter in colour. I feed fox farms tiger bloom and big bloom at 1/2 dose every other watering, seems to be some light nute burn on leaf tips that are about 1/8” from top of leaf. Temps never exceed 80 degrees and have two small fans blowing air over the flowers. Overall the plants are doing good in my newbie opinion except that the two outer plants are doubling crystal production which leads to the reason I’m seeking your opinions. First 3 pics are of the plants directly under the light and they are 12” away, I put my hand under the light and does not feel too hot to my hand as many suggested to do for testing closeness. The two pics are one that’s turned purple on leaves and just a pic of them out side the tent
Any help would be greatly appreciated!
Thanx

Apologies I meant to say first three pics are of the center plants the 4th pic is of the one plant that leaves are turning purple which I’ll post on another thread and last pics are just a few taken yesterday outside the tent.

First they need magnesium but scope before giving anything. Purple is probably genetic.

Ok thx for fast reply, just so I’m aware how is that assumption made so I can prevent this in the future?

Highflyn said:

Ok thx for fast reply, just so I’m aware how is that assumption made so I can prevent this in the future?

Click to expand...

See the cupped leaves? Praying for magnesium is the saying. Feed cal mag regularly from the start .

Got ya and I’ll be doing just that today.
As I mentioned I’m day 1 in 7th week of flower can you prescribe the dose needed and duration?

I was planning of starting my flush and end of week as the breeder says 9 week flower so would I continue Calmag throughout flushing or is this something that just needs correction and then stop?

Highflyn said:

Got ya and I’ll be doing just that today.
As I mentioned I’m day 1 in 7th week of flower can you prescribe the dose needed and duration?

I was planning of starting my flush and end of week as the breeder says 9 week flower so would I continue Calmag throughout flushing or is this something that just needs correction and then stop?

Click to expand...

Nothing at this point. Just ride it out.