I am still using their nutes. They actually buy sea shells, bat guana shit, charcoal, waste from processing sugar cane, and all kinds of stuff and blend it themselves.
They are pre-measured for a 6 gallon tank, and they have a GROW or VEG nute packet, a BLOOM or Bud packet and a MICRO packet, which is all chemicals or elements that only a MICRO amount is needed. They do NOT easily just disolve in water and they suggest you stir them in hot water first and blend them up and strain out the particles to avoid problems with the underwater pump.
They offer other "STORE BOUGHT" nutes, liquid and powders but they are for those that get the High Intensity Lights. These nutes we use are for the Bubbleponic small grower using CFLs. I do not know why, or what the difference is or the reasoning. I am as ignorant as can be when it comes to nutes, excpet I know I am happy with these.