Russet Mites?

Get a USB microscope and have a good look

If they've been 6" tall for 2 months and that is all you got growing ATM
I'd chop them, clean the room, then clean it again, then start fresh with beans just my $.02

I actually threw out most and cleaned, re cleaned and sprayed with no spider mites and cleaned some more. Got a few cuttings, but I'm worried that my new ones are infected because I've lost a few leaves on some. I probably shoulda invested in a good USB scope months ago.

It's not mites. Not sure what it was. But thanks for your help.

Here's a pic. I will probably throw this one away it's like 2 months old.

I would suspect the soil itself here, unless you're using the same batch with other plants and they're ok. I had some seriously weird shit happen when I used a batch of far-too-acidic soil to pop seeds last year, had to transplant them all. Didn't suspect the soil in the beginning so I wasted a LOT of time working on other angles, including pests and disease. Test that soil pH.

You guessed it! Phuckin ph in my run off was around 4! Checked it 4 times...I've been doing a nute, nute, water schedule using "kind" by botanicair mixed 1/2 strength. I always use 5.5 - 6 ph so I really wasn't expecting my soil to be so acidic. I guess I should be flushing more frequently?

Ph is now low because plants are too small to be up taking nutrients at the current strength or frequency.

Your options for this specific plant now is feed less frequently (feed, water, feed) or feed even less (if still feed, feed, water).

You haven't mentioned ppm except for the generic feed rule so I'm assuming you don't have a meter. Low ph with low EC is different than low ph with high EC. Flush that plant with lots of water until you runoff ph reads correctly.