Newbie in need of help! PLEASE

Whats up fellow growers.

I am busy with my 1st indoor grow. I am into week 4 of the budding process.
I am using 2x250w HPS and metal halide. Temp is kept at around 25-28 degrees Celsius humidity at around 35-45%. I’m growing in a peat moss.

I am having problems with 2 of my plants. The ones leaves are curling at the tips and it’s looking yellow. The other plant is just looking sick and yellow. I would like any advice to how to correct the problem and to make them healthy. I have attached pictures of the plants.
If I can add anymore information that might help determine the problem please let me know.

(i put 3 pics of each plant up)

Thanks for the help
Peace

cant say much without pics but from what u said it could be heat stress and nitrogen dificeincy. Also if u are budding u want to use High Pressure Sodium Bulb not MH buld.

Pix didn't come through.
Yellow leaves usually mean nitrogen deficiency. Try some fertilizer (start with a weak dose).
Overwatering can cause this problem too.
Curling usually means either heat stress or insufficient water.
28C is perfect; make sure your plants aren't too close to the lights.

if its just the lower leaves it sounds like a food deficiency. every wal-mart garden section has different options for food (spikes, liquids, pellets, etc)

Here are the pics had problems uploading them.

Yup ur gonna have to fed her sum cal-mag plus or whatever ur nute set up is that has a strong nitrogen solution.