Actually, I have a question that may answer yours. I'm fair new at this and about to try autoflowers, and from what I've read, Nebula wrote that Rapid Rooters give you the best success rate at germination, and are good for all growing mediums, including hydro. The only downside is, they come in a bag of 50 and once opened and you use what you need, throw away the rest because they'll dry out and be no good, Now, my question to you other growers is, has anyone discovered a way to keep these guys fresh? I thought about freezing them or maybe vacuum sealing, but I just don't know.