The site doesn't have an option for grams per gallon so just keep in mind I'll be sticking to 4 grams hydro 2.5 cal-nit 1.5 mag, and I've added 1ml/gal of tribus. Feed every other day.. I've fed twice and the plant has exploded with growth after that tribus. I'm not 100 percent sure if it's because of the tribus since she's always been healthy but the growth has felt more rapid since adding it.. she's getting ready to flower and looks like she is loving life😀