Well I did get spider mites once and the reason I did is because I have my tents in Garage and kept garage door open with exhaust hose blowing outside via open door. Well I believe the mites felt the warm air at night (and smell) and traveled right into garden. Well I rerouted exhaust and kept door shut and no more mites.
Never got PM.
Another thing that happened was over heating and no watering. Plants where in 4th week of 12/12 and Fan that blows through both 600 hps was shut off and forgot to turn back on. So the tent gets extra hot and dries every one out and that really hurt.
Smart Pots~ Well I love them but must remember to water twice when using them. Water once, wait 30-45 mins and come back and water again.
Organics ~ This was my first season and I have learned a lot and will continue to learn as I start a new organic season.