I buy my 7018 rod in sealed packs, from a farm supply store or Harbor Freight. The opened packs I store in a plastic rod storage container made for storing welding rods.
Just how bad is the issue of moisture in these rods if they are stored in sealed plastic tubular containers that are occasionally opened. I am not welding space vehicles or doing anything where 100% of strength is required or where life is at stake. Still, I would like to double check whether I am at risk of making completely worthless welds.