{"product_id":"air-water-ice-color-changing-di-resin-cartridge-10-inch","title":"Air Water Ice 10 inch Color Changing DI Resin Cartridge","description":"\u003cstyle\u003e\n.aq-pd{font-family:Georgia,serif;color:#1a1a1a;max-width:860px;margin:0 auto;line-height:1.7;}\n.aq-pd h2{font-size:1.45em;font-weight:700;letter-spacing:-0.01em;border-left:4px solid #666;padding-left:12px;margin:2em 0 0.6em;}\n.aq-pd p{margin:0.5em 0 1em;}\n.aq-callout{background:#1a1a1a;color:#fff;border-radius:4px;padding:16px 20px;margin:1.6em 0;font-family:Arial,sans-serif;font-size:0.93em;line-height:1.6;}\n.aq-callout strong{color:#f5c518;}\n.aq-warn{background:#fff8e1;border-left:4px solid #b8860b;padding:12px 16px;margin:1.4em 0;font-family:Arial,sans-serif;font-size:0.88em;line-height:1.6;}\n.aq-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:1em 0 1.6em;}\n.aq-feature-card{background:#f4f4f4;border-radius:4px;padding:14px 16px;border-left:3px solid #666;font-family:Arial,sans-serif;font-size:0.9em;}\n.aq-feature-card strong{display:block;margin-bottom:3px;color:#1a1a1a;}\n.aq-feature-card span{color:#555;}\n.aq-specs-table{width:100%;border-collapse:collapse;margin-top:1em;font-family:Arial,sans-serif;font-size:0.93em;}\n.aq-specs-table th{background:#1a1a1a;color:#fff;text-align:left;padding:9px 14px;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;font-size:0.82em;}\n.aq-specs-table td{padding:8px 14px;border-bottom:1px solid #e5e5e5;vertical-align:top;}\n.aq-specs-table tr:nth-child(even) td{background:#f9f9f9;}\n.aq-specs-table td:first-child{font-weight:600;width:42%;color:#444;}\n.aq-note{font-family:Arial,sans-serif;font-size:0.82em;color:#777;font-style:italic;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"aq-pd\"\u003e\n\n\u003cp\u003eA standard \u003cstrong\u003e10 inch deionization cartridge\u003c\/strong\u003e packed with colour changing mixed bed resin, and the final stage that takes RO water the rest of the way to \u003cstrong\u003ezero TDS\u003c\/strong\u003e. The resin starts blue and turns amber as it exhausts, so you can see how much life is left instead of guessing. Browse our other \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/rodi-systems-reverse-osmosis\"\u003eRODI systems and parts\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv class=\"aq-callout\"\u003e\n\u003cstrong\u003eYou can see when it is spent.\u003c\/strong\u003e The anion half of this resin carries a permanent pH indicator dye that shifts from blue to amber as capacity is used up. Watch the colour front travel down a clear housing and change the cartridge when it reaches the bottom.\n\u003c\/div\u003e\n\n\u003ch2\u003eHow Colour Changing DI Works\u003c\/h2\u003e\n\u003cp\u003eReverse osmosis gets you most of the way, but the last traces of dissolved solids need ion exchange. This cartridge holds \u003cstrong\u003e1.25 lb of ResinTech MBD-30\u003c\/strong\u003e, a 1:1 volumetric mixture of CG8-H, an amber hydrogen form cation resin, and SBG1P-OH-ID, a dyed hydroxide form type 1 porous strong base anion resin. The anion component is infused with a permanent indicator dye, so as the bed exhausts it moves from blue toward amber, top to bottom, in the direction the water flows.\u003c\/p\u003e\n\u003cp\u003eResinTech rates MBD-30 to deliver demineralized water with a resistivity \u003cstrong\u003ein excess of 18.3 megohm\u003c\/strong\u003e. For a reef tank that means RO\/DI water with nothing left in it to feed nuisance algae or push your parameters around.\u003c\/p\u003e\n\n\u003cdiv class=\"aq-warn\"\u003e\n\u003cstrong\u003eUse it in a clear housing.\u003c\/strong\u003e Colour changing resin only helps if you can see it. These cartridges are designed for see-through housings, and the convention is a safety line near the outlet end: once the colour change reaches that level, the cartridge is considered exhausted and gets swapped. In an opaque housing you are back to relying on a TDS meter, which is worth running either way.\n\u003c\/div\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cdiv class=\"aq-features\"\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eVisual Exhaustion Indicator\u003c\/strong\u003e\u003cspan\u003eBlue to amber as the bed is used up, with no meter required to see it coming.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eResinTech MBD-30\u003c\/strong\u003e\u003cspan\u003eNuclear grade mixed bed, 50 percent anion and 50 percent cation, bought direct from the manufacturer.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003e1.25 lb of Resin\u003c\/strong\u003e\u003cspan\u003ePacked into a standard 10 inch cartridge body.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003e18.3 Megohm Capable\u003c\/strong\u003e\u003cspan\u003eResinTech rates the resin to produce water in excess of 18.3 megohm resistivity.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eRefillable Body\u003c\/strong\u003e\u003cspan\u003eThe 10 inch cartridge can be refilled with bulk resin rather than replaced.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003ePacked Fresh\u003c\/strong\u003e\u003cspan\u003eAir Water Ice receives resin from the manufacturer quarterly, stores it climate controlled, and packs cartridges the day they ship.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"aq-specs-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat\u003c\/td\u003e\n\u003ctd\u003eStandard 10 inch cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e9 7\/8 in x 2.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResin\u003c\/td\u003e\n\u003ctd\u003eResinTech MBD-30 colour changing mixed bed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComposition\u003c\/td\u003e\n\u003ctd\u003e1:1 by volume, CG8-H cation and SBG1P-OH-ID anion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResin charge\u003c\/td\u003e\n\u003ctd\u003e1.25 lb per cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour change\u003c\/td\u003e\n\u003ctd\u003eBlue when fresh, amber when exhausting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity rating\u003c\/td\u003e\n\u003ctd\u003e6,800 ppm TDS per 10 inch cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum holding capacity\u003c\/td\u003e\n\u003ctd\u003e3,000 ppm TDS across almost all water profiles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistivity\u003c\/td\u003e\n\u003ctd\u003eRated in excess of 18.3 megohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefillable\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing\u003c\/td\u003e\n\u003ctd\u003eIntended for clear, see-through housings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"aq-note\"\u003eCapacity in real use depends on your source water. The ppm TDS rating is a total load figure, so the higher the TDS reaching the DI stage, the sooner the colour front moves.\u003c\/p\u003e\n\n\u003ch2\u003eGet the Most From It\u003c\/h2\u003e\n\u003cp\u003eDI resin is the most expensive stage in an RO\/DI unit per gallon, so it pays to protect it. Keep the sediment and carbon stages on schedule, replace the RO membrane when its rejection rate drops, and the DI will last considerably longer. If your DI is exhausting quickly, the membrane is usually the reason rather than the resin.\u003c\/p\u003e\n\n\u003ch2\u003ePairs With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/dow-filmtec-ro-membrane\"\u003eDow Filmtec RO membranes\u003c\/a\u003e, the stage that determines how hard your DI has to work\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hm-digital-trm-1-triple-inline-tds-meter\"\u003eHM Digital TRM-1 triple inline TDS meter\u003c\/a\u003e or the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hm-digital-tds-3-handheld-tds-meter\"\u003ehandheld TDS-3\u003c\/a\u003e to confirm zero\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/10-inch-clear-refillable-rodi-filter-cartridge\"\u003e10 inch clear refillable cartridge\u003c\/a\u003e if you would rather refill from bulk resin\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/rodi-systems-reverse-osmosis\"\u003eRODI systems and replacement filters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow long will one cartridge last?\u003c\/strong\u003e\u003cbr\u003eIt depends entirely on what reaches it. The resin is rated at 6,800 ppm TDS of total load, with a minimum 3,000 ppm across most water profiles, so a low TDS feed from a healthy membrane stretches it a long way and a failing membrane burns through it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat do the colours mean?\u003c\/strong\u003e\u003cbr\u003eBlue is fresh capacity. Amber is exhausted. The change travels in the direction of flow, so watch the outlet end and swap the cartridge when the colour reaches it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work in a non-clear housing?\u003c\/strong\u003e\u003cbr\u003eIt filters exactly the same, you just lose the benefit of seeing it. If your housing is opaque, run an inline TDS meter and change on the reading instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I refill it instead of replacing it?\u003c\/strong\u003e\u003cbr\u003eYes, the 10 inch body is refillable. Bulk colour changing resin is sold separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the same as separate anion and cation cartridges?\u003c\/strong\u003e\u003cbr\u003eNo. This is a mixed bed, both resins blended in one cartridge, which is the usual single stage DI setup. Separate anion and cation cartridges are a different, more specialised arrangement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need DI at all if I have RO?\u003c\/strong\u003e\u003cbr\u003eFor a reef tank, generally yes. RO alone typically leaves some TDS behind, and DI is what takes the last of it out to zero.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Air Water Ice","offers":[{"title":"Default Title","offer_id":50599096713435,"sku":"DICC-MixedBed-10","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/dicc-cart_9d725afd-0a42-49c3-9009-66e136cc1538.jpg?v=1791461454","url":"https:\/\/squeakysaquatics.com\/products\/air-water-ice-color-changing-di-resin-cartridge-10-inch","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}