I have used Green Cure.....non toxic...yup! But, do you want to kill them or fight them. When you are that early in veg something stronger is fine. Quit focken around and get rid of the problem.
Do this and move on.....Drench the bottom and tops of the leaves thoroughly with Azamax or similar every two days for 4 applications. Turn all lights and fans off for two hours. This will not only kill active mites but you have to get the eggs and hatching bugs as well.
These *******s can ruin your plants. You can play around or you can kill the fargin *******s... sorry to be so direct but many methods are not all that effective in TOTAL ERATICATION.
This is for indoor grows under the lights. ONLY IN VEG. If outside or in flower other techniques mus be used.
Never let these get into flower on an inside grow .... If so pray.