Help! Plant burn.

Ok, I have 5 plants growing and just transplanted them into seprete pots 5 days ago. They are 3-4 weeks old.
Two of the plants have leaves that are turning yellow at the ends and they look like they are burning ( one has all dried leaves at top and looks burned a little.)
The plants are 1.5-2 feet bellow a 250w HPS in soil.
I think it may be nutrient lock out or in...but have no idea what to do.
Help is appreciated.

Pictures?

Watering schedule?

Nutrient Schedule?

What type of room/box are you growing in?

what type of ventilation do u have?

pics really help with this kind of thing. it could be over-nute. it could be a nute lockout due to a pH imbalance (mine were showing these same signs and i thought it was burn, was actually lockout).

I ment to add, I have pics, but no way to get them off of my phone.
Closet grow, soil, water when needed (usually once a day), ventilation a rotating fan, and nuts are blood meal 12-0-0 and this 12-10-10 mix.