how far into veg are you? once you get them, they are very hard to get rid of. ladybugs and predator mites are good, but take a long time to work b/c spider mites spread very fast. you can try an 80:20 water/rubbing-alcohol mix and spray them. that will get rid of current live ones, but not the eggs. there are some room foggers you can check out. if you have some $$ to spend, get some floramite or forbid4F - both are a bit pricey, but the product will last you for a long time, and they work very well. DO NOT use in bloom.