I am looking for any sterilization formulas for growing medias (i.e. Hydroton, lecca, pumice, Aliflor, or Primeagra). I'm new to using it for s/h and unsure whether just soaking with Physan 20 is enough or if you need to bake it for an extended period after it dries from the soaking. Any personal sterilzation rituals would be appreciated. I'm mostly using Hydroton and pumice and I have a small amount of Primeagra.