You'll rarely if ever see spider mites anywhere near the soil surface- they prefer to live their entire lives high on the plant, basking in the heat of the bulbs, and laying eggs under the upper leaves.

You may wish to pyrethrin-bomb the grow room twice (3 days apart) to kill whatever pests you DO have.
stinkyattic Reviewed by stinkyattic on . Spider Mites or Amblyseius Fallacis? I wish I could post the pics from my microscope. I was checking the plants this morning and saw a bunch of fat little bugs (smaller that an average speck of sand) crawling around the soil. I took a teaspoon of sand, put it on a plate, isolated one of the buggers from the sand particles, put the plate in the toaster oven until it stopped crawling, then put him under the scope. What I found made me think spider mite. I threw some loose leaf tobacco on top of the soil (actually on top of the 1/2" Rating: 5