{"product_id":"aquatic-life-mixed-bed-resin-di-cartridge","title":"Aquatic Life Mixed Bed Resin DI Cartridge","description":"\u003cp\u003eThe \u003cstrong\u003eAquatic Life Mixed Bed Resin DI Cartridge\u003c\/strong\u003e is the final polishing stage in a reverse osmosis \/ deionization system, the step that takes already-clean RO water down to a true 0 TDS. It is packed with mixed bed resin, a blend of cation and anion exchange beads that strip out the last dissolved ions an RO membrane leaves behind. The result is the ultra-pure water that reef tanks, planted aquariums, and sensitive fish depend on for stable, algae-resistant conditions.\u003c\/p\u003e\n\u003cp style=\"margin: 14px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eHow It Works\u003c\/p\u003e\n\u003cp\u003eWater that has already passed through your sediment, carbon, and RO membrane stages flows through this cartridge last. The mixed resin grabs the remaining ions, including silicates and phosphates that feed nuisance algae, and polishes the water to 0 TDS. The color-indicating resin gradually changes shade as it exhausts, giving you an easy visual cue to pair with your TDS meter so you know exactly when it is time for a fresh cartridge.\u003c\/p\u003e\n\u003cp style=\"margin: 14px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eSpecifications\u003c\/p\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; margin: 4px 0; font-size: 0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eBrand\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003eAquatic Life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eType\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003eMixed bed deionization (DI) resin cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eStage\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003eFinal polishing, after the RO membrane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eResin\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003eMixed bed (cation + anion exchange)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eIndicator\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003eColor-changing resin shows when exhausted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eTarget output\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003e0 TDS purified water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; background: #E0F7FA; padding: 6px 10px; font-weight: 600; white-space: nowrap; text-align: left;\"\u003eUse with\u003c\/th\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 6px 10px;\"\u003eFreshwater and saltwater aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin: 14px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eWhen To Replace\u003c\/p\u003e\n\u003cp\u003eSwap the DI cartridge when your TDS meter reads above 0 to 1 on the final output, or when the resin has fully changed color. DI resin is the stage that exhausts fastest because it does the finest polishing, so keeping a spare on hand means you are never caught with cloudy water on water-change day. Replacing your sediment and carbon stages on schedule helps your DI resin last longer.\u003c\/p\u003e\n\u003cp style=\"margin: 14px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eRecommended Supplies\u003c\/p\u003e\n\u003cul style=\"margin: 4px 0; padding-left: 20px; line-height: 1.5;\"\u003e\n\u003cli\u003eKnow exactly when to replace it with an \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/autoaqua-titanium-s2-inline-tds-meter-rodi-monitor\"\u003eAutoAqua Inline TDS Meter\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eRefresh the upstream stages with a \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/ro-sediment-filter\"\u003eRO Sediment Filter\u003c\/a\u003e and \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/ro-carbon-block-filter\"\u003eRO Carbon Block Filter\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eBrowse our full range of \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/rodi-systems-reverse-osmosis\"\u003eRODI Systems \u0026amp; Reverse Osmosis\u003c\/a\u003e gear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin: 14px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eQuestions \u0026amp; Answers\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0; line-height: 1.5;\"\u003e\u003cstrong\u003eWhat does the DI stage do that the RO membrane does not?\u003c\/strong\u003e\u003cbr\u003eAn RO membrane removes most dissolved solids but not quite all of them. The mixed bed DI resin polishes off the remaining ions to reach a true 0 TDS, which is important for reef tanks and other sensitive systems.\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0; line-height: 1.5;\"\u003e\u003cstrong\u003eHow do I know when to change it?\u003c\/strong\u003e\u003cbr\u003eUse a TDS meter on the final output. When it climbs above 0 to 1, the resin is spent. The color-indicating resin also changes shade as it exhausts, giving you a second visual confirmation.\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0; line-height: 1.5;\"\u003e\u003cstrong\u003eWill it fit my system?\u003c\/strong\u003e\u003cbr\u003eThis is a standard inline DI cartridge for reverse osmosis \/ deionization systems. It works in Aquatic Life RODI units and other systems that use the same cartridge format.\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0; line-height: 1.5;\"\u003e\u003cstrong\u003eDo I need pure water for a freshwater tank too?\u003c\/strong\u003e\u003cbr\u003eIt helps. Starting with 0 TDS water lets you dial in exact parameters, avoid unwanted minerals, and reduce algae, which benefits planted tanks, shrimp, and soft-water species as much as reef tanks.\u003c\/p\u003e","brand":"Aquatic Life","offers":[{"title":"Default Title","offer_id":48789829124315,"sku":"01091","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/AL01091-2.png?v=1779215726","url":"https:\/\/squeakysaquatics.com\/products\/aquatic-life-mixed-bed-resin-di-cartridge","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}