Helppppp!!! New leaves Tight Curl Slight yellow +

My Grow is in 3rd week Veg and new leaves have tight curl downwards and upwards a Slight yellow colour on tips and half way down plant some older (2 large leaves) have yellow spots in foilage not veins. PH in Pot is 6.2 PH, in Tank is 6.1 the Pot is filled with Canna coco Pro and Clay pebbles. I did over water these in Wk 1 slightly but its now growing 1~1.25 Inches a day and seems fine apart from this issue....Ive moved light a few inches further away 400W HPS and a few T5 around.....Air circulation is VERY GOOD.......Can anyone tell me what this is? Its not rapid decline but its areflection on my skillzzzz....HELP!

NO Brown patches! nice bushy plant but im lost for what this could be!

pictures would be very beneficial in diagnosing your situation.........

have you been feeding your babies and if so, what and how much?

good luck and post some pictures so we can see your details

iget general health nurtient like liquid karma or cal mag. Or even just pottassium. Yellowing occurs from a variety of problems and good plant minerals can fight off all of your unserlying conditions. (lack of light, overwatering, too much heat, too much base)