lol not sure. If they do im sure they wash it first. Thise guys at the shop are all super nice but they are salesmen. They always want to sell me things i dont need. Which is why i will always come to these forums with my questions. No one has tried to sell me anything, yet. Lol
Doc Bud could sell you a kit of the best nutrients, soil amendments, and system for growing dank nugs for less than lower quality nutes at the hydro shop. From all the results I see here, a totally excellent system (excellent as in excels compared to other systems.)
If you have a legal grow consider sending Doc Bud a PM about the kit.
Disclaimer: I don't use the kit myself (I can be a stubborn old curmudgeon,) but I know my harvests would be way better if I did.