you may cause burn if you add FF nutes to every watering, i would go with the recommended amount and see how they do first. if they respond well then u can try pushing them and feed every watering but back off at first sign of burn. I use FF for hydro and for the strains i've done i've noticed the top of the range of PPM is usually too high for my plants. i think they recommend the highest possible ppm because they want u to use as much nutes as possible to keep you buying more.