they have a site
Dutch Master - For the Biggest, Hardest, Heaviest Yields EVER!! GUARANTEED! - GOLD Nutrient AVAILABLE NOW! im not sure if u can buy it from there but i bought all mine from ebay...australian ebay but im sure he sends to whereever u are if ur not in australia. and the guy who sells lots of thier stuff is really good with postage he combined it all for me and it was really cheap...they sell it in the hyro shop here too but maybe its an australian thing i dont know.
and as for the advice u gave me last night bout humidity i havnt been checking...and i will now...and hopefully this time i get even more cos i wont get mold...im going to add a fan to bring air in...i have those grow tents and only an extraction fan not one to move air or bring in.
i do my grow in eight weeks...as i have two rooms...i grow the veg in one and flower in another so when one flower is ready to pick the veg ones are ready to go in.
and im growing in that coconut husk soily stuff with clay balls on top to stop those tiny annoying fly things.