Check the listing for details. Deep Blue Ammonia Reducer Aquarium Filter Pad 18 X 10 ". Condition: New. Listed at 13.49 USD. DEEP BLUE AMMONIA REDUCER FILTER PAD Certain images and/or photos used in this template are the copyrighted property of JupiterImages and are being used with permission under license Auction is for ( 1 ) DEEP BLUE AMMONIA REDUCER FILTER PAD AQUARIUM 18 " X 10 " Deep Blue Professional Cut to fit media pads traps micro and macro organic particles, foreign debris, and excess fish food. For use in custom sumps/refugiums, hang-on filters, prefilter boxes, and more. Safe for both freshwater and marine aquaria. Chemical & Mechanical Dual stage filtration Reduces ammonia spikes and toxic buildup Promotes a healthy aquatic environment. New thicker, more rigid design for extended use. If you win more than one auction i will send an invoice with a combined shipping rate so you can save on shipping. If you have any questions about this or any of my products feel free to contact. Thank you !