I am currently freezing my dry media and vitamins. My neighbor said that would increase the life of the vitamins. Is this correct? I made 8 MONTHS worth of dry media so it seems like a waste to dump it if it goes bad. How do I check if something went bad? Is it like milk where it seems funky? I mean, my dry media seems bad already, will it turn like, good smelling when it decays? He he...