Calcium and Zinc are in Grow Big Hydroponic. I was using it strait up with no problems. No Big Bloom (fuck that shit in hydro). Cost wasn't that big of a deal. I have no idea what the recommend dosage is cause I never follow that on bottles anyways. I've never really liked their Grow Big for soil or the flower nutes. The hydro veg nutes, like I said, are the shit.
The thing is nutes are nutes. It's how you use them vs cost. Any of them are good. Advanced, FF, Botanicare, Cutting Edge, H&G, GH, Hydroponic Research, Biobizz, Earth Juice, Mills, Alaskan fish ferts ect.