OldMac I dont know what to think about this have never had spider mites but will take a good look at them in the am I guess right about now LOL This is my first aro grow so having a few problems I ave the ppm at 600-700 Added a little cal mag and super thrive. PH5.5 it dont rise any . I was using fox farm grow big 3-2-6 just started Tiger Bloom (2-8-4). have never had this in soil before.