I e-mailed them a while back, and was informed by Fox Farms that the micronutes are in the Grow big and Tiger Bloom. And that the Big Bloom is a catalyst (an organic tea) formulated to work with both Grow Big in veg, and Tiger Bloom in flower, per their feeding schedule.

Am curious where you got the 1/2 cup per gallon idea from, as their feeding schedule doesn't mention it as a stand-alone nutrient, and max listed dilution rate is 2 tablespoon per gallon in veg. (per week) The link to the FF feeding schedule is in my signature. A handy chart that you can print and reference on feeding days.

Not sure how you'd use it with another product or as a stand alone, as that's not it's intended use. Likely as an organic tea additive, but little more. Mixing with products from a different company, you risk overdoing it or a wasteful redundancy.