Yellowing/browning

two big bang autos
8 cfl bulbs, 23 w each 6400k and 2700k mixed
water with big bloom and bio grow by biobizz
soil is biobizz all mix

only feed twice with bio grow and big bloom with 0.5ml first feed of each then 1ml of each yesterday because i thought maybe lack of nutrients
but could be that it is overwatering,
so i have came for advice does anyone know how to sort this yellowing/browning, some leafs seem to be ripped or holes

i dont see any spidermite but could b wrong

do you pH before you give it to them?

yeh i always test ph the last time i water the run off was 6.5 i used a little ph down as it was at 7 i use the ph tester kit liquid so have to go by the colour