I used the GH calmag but was lazy and listed it as foxfarm. Its got what plants love.
The microbe brew saved the grow at the beginning and surprised me how well it worked. It was a bit pricey but you don't need a lot. I was having bad outbreaks of algae and other bacteria but I think replacing them with the good bacteria stopped it from spreading. The plants also took off after adding it. It was like the missing key!