not for canibis i wouldnt use more then 1 teaspoon per gal water not 1 cup per gal water 3% HP. good soil grow would never require HP but sick root system in hydro might require some and i dont believe them messuments would be correct. be fryn some canibis 4sure
as for the industrial strength HP i wouldnt know ive only experince with 3% off the pharmy shelf.