Spider Mites in my Crib?

So my plants are about 3 1/2 - 4 weeks old, they've been green as hell up until now

im using a mix of

- Coco, by bitonicare
- happy frog
- rice hulls for extra aeration

my nute mix is

Earth Juice Grow & Micro
With distilled

I originally thought that I may have been having a calcium def, but I pulled them out of the room & saw a tiny little tan looking guy floating down from one of the leaves in the breeze of the fan, i thought it was a piece of yellowing dried leaf until it landed on me & started crawling, should i grab some neem & start spraying? i have a little problem with gnats too

Definitely not a mite. Theyre like the size of a pen tip if not smaller. You wouldn't be able to see one floating down in mid air.

Thats good, so maybe it IS a calcium def?

Are you using ro water? If so you have to supplement cal. I believe coco also absorbs ca big time. I run a hydro setup so im not 100% sour on soil setups.

You should always be spraying with some type of pest preventative no matter what. I use azamax until 3rd week of flower. I check my plants daily for bugs as well.