They all use the same salts, pretty much with the same NPK ratio which is what you should be focused on more than the brand. Mono potassium phosphate is Mono potassium phosphate etc no matter what the brand is. 100-150ppm N, 30-60ppmP, 125-200ppmK, 50-100ppmCa, 20-50ppmMg with micros. Get...