Check the listing for details. Hydro-Logic Big BOY - 4.5" x 20" Refillable Filter Cartridge With Carbon/KDF85. Condition: New. Listed at 94.99 USD. Hydro-Logic KDF85 Carbon Replacement Filter The Hydro-Logic KDF85/Carbon Replacement Filter is designed to enhance your water filtration system, addressing specific water quality concerns. Key Features: Effective Filtration: This filter combines KDF 85 and Granular Activated Catalytic Coconut Shell Carbon for comprehensive water treatment. Contaminant Removal: Removes iron, sulfur, and unpleasant odors, ensuring clean and fresh water. Filter Size: Measures 4.5"x20", fitting standard Big Blue Housings for convenient use. Specialized Media: Unique blend addresses iron, hydrogen sulfide, scale, bacteria, and algae. Advantages: Cost-Effective: Competitive iron removal at a fraction of the cost. Easy Replacement: No media regeneration needed, simplifying cartridge replacement. No Backwashing: Unlike some systems, no backwashing is required. Wide pH Range: Effective filtration at pH 6.5 to 8.5. Odor Reduction: Removes iron and hydrogen sulfide, eliminating unpleasant smells. Safe for Drinking Water: Does not introduce harmful chemicals, ensuring safe drinking water. Applications: Suitable for water with low to moderate ferrous iron or hydrogen sulfide contamination. Most effective when levels are less than 5 ppm, and pH is between 6.5 and 8.5. Can also remove ferric iron through mechanical filtration. Filter Life: Filter life depends on contamination level and daily water consumption. Typically lasts about 20,000 gallons in a residential setting. Consider using a sediment pre-filter to extend life. Common Water Issues: Rusty Stains: Excess iron. Black Stains: Excess manganese. Rotten Egg Smell: Hydrogen sulfide (H2S). How it Works: KDF85 media serves as a catalyst, transforming soluble iron cations into insoluble ferric hydroxide, trapped in the filter. Hydrogen sulfide is converted into an insoluble sulfide precipitate and filtered. Ferric iron is removed through mechanical filtration. Specifications & Operating Conditions: Housing Material: Polypropylene Maximum Flow Rate: 3 Gallons Per Minute Operating Temperature Range: 40-100°F Maximum Pressure: 90 PSI pH Level: 6.5 to 8.5 Recommended Dissolved Oxygen: Iron level in ppm x 0.6 Maximum Iron Level: 5 ppm Enhance your water quality with the Hydro-Logic KDF85 Carbon Replacement Filter. Shipping Continental U.S. Buyers pay the shipping price listed. In cases where items have a flat shipping rate, please take note that this is a fixed price and should be considered when purchasing the item. Fixed/flat rates are non-negotiable unless other items are added to your order, in which case shipping may be adjusted. Alaska, Hawaii, and A.P.O. addresses: please contact us for a shipping quote and availability BEFORE bidding. Also will use only USPS to these areas. If an item is refunded on free shipping, there will be a 25% restocking fee. Terms of Sale Returns must be made within 14 days of receiving the item. The item MUST BE UNUSED in order to receive a refund. Unused Items: We will accept returns on any unused and unopened items 14 days from the delivery date. Shipping and Handling charges are NON-REFUNDABLE, and Buyer is responsible for return shipping.