Having some serious plant problems can anyone help asap!

My ph has been at 5.5 since seedling, indoor pots under 400 watt platnium led. Not sure if this is nute def or pest problem. Forst time ive had problems in 3 mons? Can some please help

ph?
growing method?
lights?
temps?
rh?
brand of nutes?
area?
circulation?
strain?
age?

calmag is the answer if you don't provide details.

JFlame said:

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raise ph to 5.8, what are you feeding?

might need to add a cal/mag+ (2-5ml per gallon)

Thank you sir for helping me.

My ph is 5.5/ run off ph is 5.5,

In fox farm happy forest soil/ 5 gallon pots

Lights are 400 watt led platnium

Temp always in between 75 to 83

Flora nova bloom, cal mag, sweet and citrus every other watering

Located in closet alot of circulation with tent inline fan and fresh air intake

Some strain of purple i got from a buddy called purple world or purple rain

2 1/2 mons old

Currently on 2nd week of flowering