New Mexico's Original Grow Store Since 1993
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General Hydroponics pH Control Kit comes with everything you need to test your pH and adjust accordingly with the pH Up and Down solutions. Contains: 8 oz. pH UP, 8 oz. pH DOWN, 1 oz. indicator & vial. FNGhydro.com recommends a pH of 6.3 for soil and 5.8 for hydroponics.