help

what do you think of this i was thinking mn or mg im useing the general organics go line package thing this is my first grow i have been learning so much and trying to read read read but i think i have been trying to learn to much on my own and getting flusterd i have a pic of one of the bad leaves and ill give ya a little info on my grow room

right now i have swiss cheese and train wreck all are 3 weeks into flower

lights i have are 2 bigfoot 1000w hps
co2
ro water
everything i use is clean and sanitized grow room is super clean i have a spider mite problem well had i use tripple threat bugs that work AWSOME
my ph in the soil is 7 for the tw and it gets low like 5.0 in the swiss cheese but the go say not to adjust the ph my babys where so beautiful and now im seeing theese leaves do this only one or 2 per plant but thats more than enuff to freak me out so what are your thoughts
this is my first post and i love this sight so much info thanks in advance

I see mite damage. I would start by correcting your ph 6.5 to 6.8 for soil,6 to 6.3 for soil-less 5.8 to 6.3 for hydro. if you go below 5.8 you see big problems.

im useing soil its fox farms frog somthing or other and the general organics people said not to adjust the ph is there anything i can use that wont mess with the G O line nutes and thanks for the reply