SOIL Please help

[Alien3000]

Please help i am growing strawberry cough strain am at day 23 of flowering ... am using 5 gal pot in coco soil mix with cfl light about 340 watt and in grow tent ... the problem is most of the lower leaves and some leaves inside the plant are turring yellow and most of the leaves are willting ... is this a nitrogen defenciy or overwatering or low light ?? Please help me . I posted some picture maybe its help to detecet the problem thanks a lot i an using flora trio nutrions

[Jr83]

Have u flushed ur soil at all if not its most likely nute lock happened to me flush e m and add a 1/ 4 strength nutes