The Spider Mite is a crop killer. In case of a beginning of an invasion it’s going to be a serious battle. I would recommend SNS 217 from Sierra Natural Science. In prevention, you can keep your RH around 60% until week 4 of flowering, they can’t breathe in high levels of RH. Spray the plants with water once a week until week 3 of flowering, to give them a heavy cleaning rain. And finally, keep your plants strong and healthy, spider mites tend to go for the weak plants first to set up a first nest and prepare for invading the entire crop. They won’t start an invasion on a strong and healthy plant.