best prevetion methods against pests and disease

i have a perpetual harvest setup total 1400w,ac,temp fan controler,probably gonna upgrade to about 2200w and maybe co2,now the summer is coming where i live and im worried about getting infested whit spider mites or some other insect or mold,i heard that keeping the conditions as close to perfect is a form of defence,i orderd a sulphur burner and have a few sticky strips.Any one have any suggestions on means of protection

i got this advice from a member here

Epsom salts are very good for your grow. Use it once a month and it will strengthen your weed and prevent a lot of problems. 1 Tsp./ gallon of water. Just don't go crazy with it.