Once upon a time I ran water bottled nutrients, and then came an awakening to dry nutrient salts and the use of Jacks Professional Hydroponic mix. It worked serviceably well for a couple of years.
Then, an online search- shipping it is pricey!- and some networking amongst my friends yielded a discovery, there was a dry nutrients maker/formulator right here in Colorado!
Hydrogardens.com has been around awhile, yadda yadda. Their prices are very competitive with Jacks- and that means they're stupid cheap compared to anything that comes wet.
I bought their 'hi K' hydro formula, 5-11-26 with micronutrients. I also bought Yara Liva brand calcium nitrate, a fifty pound bag of epsom salt and another of MKP, aka monopotassium phosphate.
I think it's even better than Jacks because it mixes better, there are no insoluble granules, no dyes, it goes into solution fast and stays that way.
No, this isn't an advertisement, it's a legit thread to tell people about a good product- one that I've been using for a long time and can therefore personally recommend.
Who else here uses it, what products of theirs do you use and how do you like it?