API Crystal BIO-Chem ZORB Size 10 Aquarium Filtration Media Cartridges Description Size:10 API BIO-CHEM ZORB SIZE 10 cartridge uses superior resins and activated carbon to clean and clear aquarium water, removing aquarium pollutants such as colors, odors, and heavy metals. The research-grade resin-carbon blend is up to 3x more effective in clearing water than carbon alone. BIO-CHEM ZORB corrects poor water quality caused by pollutants that can suppress a fish's immune system, leading to disease or death. Replace monthly, or sooner if aquarium is heavily stocked or colors/odors are detected. Can be used to remove medication from water once disease treatment is completed. Contains 2 filtration media cartridges. With API Aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results. Features: Contains one (1) API CRYSTAL BIO-CHEM ZORB SIZE 10 Aquarium Filtration Media Cartridges for API SUPERCLEAN 10 2-Count BoxCleans and clears aquarium water removing debris and aquarium pollutants, including colors, odors, heavy metals, and toxic gases which cloud water and degrade water quality.Contains a unique superior resin-carbon blend that removes compounds 3x more effectively than carbon alone.Easy-to-use pre-dosed cartridge fits internal filters API SUPERCLEAN 10, for freshwater, saltwater, and reef aquariumsUse when starting or maintaining an aquarium, replace monthly or sooner if aquarium is heavily stock and/or colors and odors are detected Product Details: Product Dimensions: 2.2 x 0.2 x 4.2 inchesShipping Weight: 0.6 ouncesDomestic Shipping: Item can be shipped within U.S.California residents: Click here for Proposition 65 warning.Item model number: 172306#63 in Aquarium Pumps & Filters Payment We accept Paypal payments only. Sales tax may be applied to your purchase as we possess sales tax certificates for all states we collect sales tax in. If your state is one that we charge sales tax in, you will see the sales tax charge at time of checkout before you submit payment. Delivery Expedited shipping is free. Handling time on our orders is normally between 1-2 business days. Your order should reach you within 1-3 business days. We do not ship to AK, HI, PO boxes, or APO addresses. We're not responsible for any incorrect or undeliverable addresses. We only ship to the confirmed Paypal address. We don't accept requests to change shipping addresses post purchase. We do not ship to AK, HI, PO boxes, or APO addresses. We are not responsible for any incorrect or undeliverable addresses. We only ship to the confirmed Paypal address. Please note that manufactures update their packaging from time to time and that the packaging images shown in our product may vary from what you ultimately receive however be assured you are receiving the identical contents you ordered. Return Policy You may return new, unopened items within 30 days of delivery for a refund, and a restocking fee may apply. Return shipping fees are not refundable. Message us for return instructions if you have questions. Support & Feedback We take our reputation seriously, we buy and sell online, so we understand the value of trust. If you are unsatisfied with your order, please contact us and we will work with you to resolve it to your satisfaction. Contact us via eCRATER messaging and we will respond within 1 business day. Our office hours are 8AM-4PM PST Monday-Friday. We thank you for your business!