PLEASE PLEASE HELP Yellowing During Flowering

Hey please can someone help me with a issue I have super cheese plant which has been in Veg for 1 and a half month, I have used coco soil i fed her in veg with plant magic.
Once I finished with my LST i put it under a 400 watt HPS and started feeding blooming plant magic every 3 days. As a few days passed the leaves started going a light lime colour.
The plant is showing its gender still showing signs of growth but the colour is worrying me it has been in 12/12 for 14 days.
I have 2 fans in the grow room to keep the air circulated. Please some one help me and I do not have a PH tester thanks a lot.

Also sorry i have not named the pics but the pic when the plant is green that is while it was in veg.

Look up nute burn and check the symptom list. I'd give you more to go on but I'm not a guru. Also make sure you PH is adjusted right. You just might need to flush and start afresh with your nutes.

if the soil is wet all the time its root rot. If its goes dry before you water then you need nitrogen. a lot of times plants will turn yellow if you dont have a fan. but you do so i would say it needs nitrogen. pick up some miracle gro all purpose 20 20 20 half teaspoon per gal of water mix it up good also add half teaspoon epsome salt or calmag. it should clear up in two weeks.