Honestly, I bleach the shit out of my tent before every grow and while in veg I spray em constantly with neem. Plus keeping RH values high as well as high CO2 levels help. Supposedly some guys use no pest gas pellets (or whatever they are) during veg to keep the mites away and ive seem them have good results. Im just not sure if Id want to have all that in my tent, being that it is a poison.
These are outdoor plants grown in so cal. I hit them with a solid dose of nuke em, gave them a root drench of neem oil, waited 6 hours and flushed. Then i hit them with the hose, sprayed them down real good. now im about to spray with caps foliar heavy dose.
One of the spec was moving. and there was a tiny bit of weebing. idk it could be a actual spiders web. cause i cant find any live mites. i honestly dont even know how they would be able to take root cause like i said. ive been spraying like crazy. for a while now. I cant find any damage to the leafs. ill post full pics soon.
Since youve seen webbing and what looks like spider mite shit on the back surfaces of your leaves you could possibly be noticing the early signs of an infestation. If in doubt, treat for mites. Cheers.