i use aluminum sulfate to lower pH... like 1/4 tsp or something gets its about right in a 3 gal res for me.. but i mean add al ittle let it mix and dissolve before adding more. I tried pH down but it took like 20 drops to lower pH by 0.1 and did not stabalize really.
bloodbrother Reviewed by bloodbrother on . PH Levels What is the acceptable PH range in Hydro? Searching PH gives me no results... Rating: 5