Been preachin Hydro-gardens.com for many yrs.....Excellent info Icky......and....
Knew immediately what the mater tyin clip thingy was cuz I bought 1 when they first came out for my veggie garden and such......
Bought my digital scales from there as well , and although I`ve helped buncha folks learn about mixin their own dry nutes , Hydro-Gardens does NOT ship in brown paper pkgs as you stated and my paranoid growbro`s went backta GH 3 part for the most part......
Your attention to detail is to be commended in the mixing process , and gladta see the news on a cheap ph down as well......
I always went to the parts store and bought battery acid fer waaaay cheap , but it freaks folks out when yas tell em yas used that shit ta grow dope......
Hope the transition to blumats is an easy 1.....
Good luck....DHF....

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Edit: Hydro-Gardens is NOT grower friendly since they supply folks like Walt Disney World ,and most major hydroponic greenhouse veggie growers , so please , if contacting said place don`t reference pot growin or they`ll hang up on yas....
Same thing if yas contact the folks directly for smart pots.....Killer prices if yas know howta go about askin for japanese maple containers and nutes for your greenhouse veggies though.....