CATALYST® Iron, Manganese and Hydrogen sulfide removal. Turbidity reduction. Dechlorination. RO and DI pretreatment. Specifications:   pH: Catalyst® media is stable within a range of 5.0 to 9.0 pH. However, keep in mind that the generally acceptable range for drinking water is 6.5 to 8.5 pH. At extreme ranges of pH (both low and high), contaminant removal and bed stability are adversely affected. This should be considered in applications operating at the high and low ends of Catalyst®'s 5.0 to 9.0 pH range. We suggest conducting a test for the ORP (Oxygen Reduction Potential) before using Catalyst®. If the ORP is less than 100, some form of pre-oxidation must be used.   OXIDIZERS: The use of oxidizers (e.g. oxygen, chlorine, ozone, hydrogen peroxide, potassium permanganate, etc.) greatly enhances the action of Catalyst®. An added benefit of using oxidizers with Catalyst® is the media's ability to remove 70% to 100% of the oxidizers utilized, thereby eliminating the need for additional water treatment equipment. Organic Iron (heme, pink-water, etc.): This problem can be overcome by the use of potassium permanganate on a continuous basis. Intermittent regeneration with potassium permanganate has been highly successful.   TDS: The maximum acceptable TDS level for drinking water is 500 ppm. Catalyst® media may be successfully applied at levels exceeding 1100 ppm TDS. However, at high TDS levels, highly ionized salts, such as sodium chloride, will require the use of added oxidizers.