Drop per gallon . I tried a tsp. per gallon once and it did evil things to ph stability for the remainder of the grow .
Peace
Crispi :jointsmile:
xcrispi Reviewed by xcrispi on . have u used super thrive has any 1 user super thrive with hydro ? if so , when did u use it and how much ? just bought a small bottle so ill give it a go thanx:thumbsup: Rating: 5