humbolts gravity

anyone use this product from humbolt county. i currently added this to my resivor seeing that im 2-3 weeks from finishing. according to my hydro store owner this product is gonna swell and harden my buds. its a tril run and will report on the results.... anyone swear by this "gravity"

I haven't used it myself(came very close recently) but I have some bud right now that was likely finished with Gravity. Nugs are hard as hell. It does a real good job if that's your thing. I came to realize that it just isn't mine. I prefer my buds "au natural". Props to Humboldt, though, they definitely deliver as advertised.