deficiency or?

Hello there
I would like to kindly ask for advice how to solve this issue, i had some light burn at the beginning, leaves were a bit curled up and a bit yellowed, now it seems to be worse and im not sure if it is due to still being light burned, or it is a some sort of deficiency ( i suspect calcium/magnesium?).
There are 3 photoperiod plants (cookies usa pyramid seeds, purple kush budha seeds and royal gorilla from RQS) and 1 auto (dark devil sweet seeds), it's in bio canna tera plus soil and i use bio canna fertilizers (currently bio vega, bio rhizotonic) about 1liter of distilled water mix to 25liter pots The light is pure factory fission 600w currently at 60 percent at height about 100cm. Plants are now 1 month old. Temp in tent is around 26 *C and humidity around 50-60. Ph and Ec i dunno since i use bio products only. So can anybody please tell me what's being wrong with them? Thank you!
(some photos were took when they were younger and the issue was in early stage)

Edit: i also wanted to ask, if it's cal/mag deficiency, would be okay to use cal mag xtra (advanced nutrients)? Won't it mess with the bio canna fertilizers?

You got a few deficiencies. Two plants look ok showing less foliar symptoms. What I see is a potassium deficiency in the burnt spots near the leaf ends. And phosphorus deficiency in the red petioles, the 'veins' and the bunchy tops in veg with a redfish hue. And of course cal-mag supplement.
Decrease humidity if you can to increase vpd. Acidify the soil a bit, up curl is a sign of alkalinity. Maybe feed more or stronger solution or supplement.

Thank you for the input, i'll try to give it the calmag and raise the dosage of those bio cannas, was searching around the net a bit and found out that it happen to some other people too :/

Looks like you can use a little more nitrogen. What soil are you using? Earth worm castings would help.