apparently an inch of playsand (baked at 375F of course) will help with gnats and other burrowing larvae.

I have yet to validate this though.
blink_inc Reviewed by blink_inc on . 1" of pearlite on top? WARNING: This is a precautionary question from a newbie. I'm curious if there is any reason I shouldnt add an inch of pure pearlite to the top of my soil to slightly increase light on the underside of the plant? Rating: 5