{"product_id":"puregen-aptera-alkamag-water-filter-2-5-x-12-inline-with-1-4-fip","title":"Puregen Aptera AlkaMag Inline Alkaline \u0026 Remineralization Filter — Post-RO, 2.5\" x 12\", 1\/4\" FPT (APTERA-INLINE)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cstyle\u003e\n  .ro-wrap {\n    --deep:#0a1628;--ocean:#0f3460;--blue:#1565c0;--sky:#2196f3;--aqua:#4dd0e1;\n    --white:#ffffff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#4a6280;\n    --gold:#f59e0b;--radius:12px;\n    font-family:'DM Sans',sans-serif;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-wrap:break-word;word-break:break-word;min-width:0;\n  }\n  .ro-wrap .ro-hero{background:linear-gradient(135deg,var(--deep) 0%,var(--ocean) 50%,#1a5276 100%);color:var(--white);padding:52px 40px 44px;position:relative;overflow:hidden;border-radius:var(--radius) var(--radius) 0 0;}\n  .ro-wrap .ro-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 70% 55% 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200px;padding:24px 22px;border-right:1px solid rgba(255,255,255,.1);}\n  .ro-wrap .benefit-item:last-child{border-right:none;}\n  .ro-wrap .bi-icon{font-size:22px !important;margin-bottom:10px;}\n  .ro-wrap .benefit-item h4{font-size:15px !important;font-weight:600;color:var(--aqua);margin-bottom:5px;text-transform:uppercase;letter-spacing:.05em;}\n  .ro-wrap .benefit-item p{font-size:15px !important;color:rgba(255,255,255,.65);line-height:1.55;margin:0;}\n  @media(max-width:640px){\n    .ro-wrap .ro-hero{padding:36px 24px 32px;}\n    .ro-wrap .ro-section{padding:28px 20px;}\n    .ro-wrap .ro-feature-grid,.ro-wrap .spec-cards,.ro-wrap .kit-list{grid-template-columns:1fr;}\n    .ro-wrap .benefits-strip{flex-direction:column;}\n    .ro-wrap .benefit-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1);}\n  }\n  .ro-wrap p,\n  .ro-wrap li,\n  .ro-wrap td,\n  .ro-wrap th,\n  .ro-wrap .ro-section \u003e p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap .ro-section \u003e p,\n  .ro-wrap .ro-callout p,\n  .ro-wrap .ro-feature-card p,\n  .ro-wrap .spec-card .sc-note,\n  .ro-wrap .pro-tip p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap h2 { font-size: clamp(26px,4vw,40px) !important; line-height:1.15 !important; }\n  .ro-wrap h3 { font-size: 20px !important; line-height:1.3 !important; }\n  .ro-wrap h4 { font-size: 18px !important; line-height:1.3 !important; }\n  .ro-wrap .ro-label,\n  .ro-wrap .sc-label { font-size: 14px !important; }\n  .ro-wrap .ro-title { font-size: 24px !important; }\n  .ro-wrap .ro-eyebrow { font-size: 14px !important; }\n  .ro-wrap .ro-badge { font-size: 15px !important; }\n\u003c\/style\u003e\n\u003cdiv class=\"ro-wrap\"\u003e\n\u003cdiv class=\"ro-hero\"\u003e\n\u003cdiv class=\"ro-eyebrow\"\u003ePuregen · Aptera AlkaMag Series\u003c\/div\u003e\n\u003ch2\u003e\n\u003cem\u003eAptera AlkaMag\u003c\/em\u003e Inline Alkaline \u0026amp; Remineralization Filter\u003c\/h2\u003e\n\u003cp class=\"ro-tagline\"\u003eA post-RO polishing cartridge that puts calcium and magnesium back into reverse-osmosis water and lifts its pH. A sealed 2.5\" × 12\" inline body with 1\/4\" FPT ports that installs on the product-water line, ahead of your storage tank.\u003c\/p\u003e\n\u003cdiv class=\"ro-badges\"\u003e\n\u003cspan class=\"ro-badge\"\u003e✓ Post-RO Remineralization\u003c\/span\u003e \u003cspan class=\"ro-badge\"\u003e✓ Raises pH +1 to +3\u003c\/span\u003e \u003cspan class=\"ro-badge\"\u003e✓ Adds Calcium \u0026amp; Magnesium\u003c\/span\u003e \u003cspan class=\"ro-badge\"\u003e✓ 1\/4\" FPT Inline\u003c\/span\u003e \u003cspan class=\"ro-badge\"\u003e✓ 500–1,000 Gallons\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-callout\"\u003e\n\u003cp\u003eReverse osmosis does its job almost too well — it strips out nearly everything, including the calcium and magnesium that give water its body and a neutral pH. The result is often water that tastes flat and sits slightly acidic. The \u003cstrong\u003ePuregen Aptera AlkaMag\u003c\/strong\u003e is a sealed inline cartridge that corrects that on the way to the tank. Its media bed dissolves a small, controlled amount of \u003cstrong\u003ecalcium carbonate (calcite)\u003c\/strong\u003e and \u003cstrong\u003emagnesium (corosex)\u003c\/strong\u003e back into the permeate, raising pH by roughly \u003cstrong\u003e1 to 3 points\u003c\/strong\u003e toward 8.0+ and restoring a clean mineral taste. It also carries a neodymium magnetic module and a stack of mineral and ceramic medias the manufacturer characterizes as emitting far-infrared energy and negative ions and lowering the water's ORP. Because it works by contact time, it is designed to run at the RO membrane's slow production rate — installed on the permeate line between the membrane and the holding tank. It is a polishing stage, \u003cstrong\u003enot a standalone filter.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eSPECIFICATIONS\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eKey Performance Metrics\u003c\/h2\u003e\n\u003cdiv class=\"spec-cards\"\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eFunction\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eAlkaline \/ Remineralize\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003ePost-RO polishing stage\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003epH Lift\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e+1 to +3\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eToward 8.0+, depends on flow \u0026amp; source\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eFlow Rate\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e0.025–0.035 GPM\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eContact-time limited; slower = more lift\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eCapacity\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e500–1,000 Gal\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eRoughly 6–12 months of typical use\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eMax Pressure\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e80 PSI\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eMax temperature 90°F\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eConnections\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e1\/4\" FPT\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eFemale NPT threaded, both ends\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWHERE IT GOES\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eInstall on the Permeate Line, Before the Tank\u003c\/h2\u003e\n\u003cp\u003eThis filter is meant for one spot: the product-water line running from the \u003cstrong\u003eoutlet of your RO membrane to your storage tank\u003c\/strong\u003e. That is where the water is already purified and moving at the membrane's slow production rate, which is exactly what the media needs — the water has to sit in contact with the calcite, corosex, and mineral beds long enough to pick up minerals and shift pH. Puregen rates it for RO systems producing \u003cstrong\u003eup to 50 GPD\u003c\/strong\u003e. Run it faster than its 0.025–0.035 GPM design flow and you get less mineral pickup and less pH lift.\u003c\/p\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e⚠️\u003c\/span\u003e\u003cstrong\u003eThis is not a standalone filter.\u003c\/strong\u003e It does not remove sediment, chlorine, or contaminants and is not built to take full line pressure or municipal tap water. It polishes water that has already been through reverse osmosis. Plumb it after the membrane, never on the feed side.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eTECHNICAL DETAILS\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eConstruction \u0026amp; Media\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eAPTERA-INLINE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eSealed inline alkaline \/ remineralization cartridge for post-RO use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Media\u003c\/td\u003e\n\u003ctd\u003eCalcium carbonate (calcite) and magnesium oxide (corosex) with mineral beads — the active blend that raises pH and reintroduces calcium and magnesium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional Media\u003c\/td\u003e\n\u003ctd\u003eMulti-stage bed that also includes a neodymium magnetic module, quartz, and tourmaline \/ Pi \/ negative-ion ceramics. The manufacturer characterizes these as emitting far-infrared rays and negative ions and lowering ORP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Effect\u003c\/td\u003e\n\u003ctd\u003eRaises pH by approximately 1 to 3 points, toward 8.0 or higher, depending on source water and flow rate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eORP\u003c\/td\u003e\n\u003ctd\u003eManufacturer states the media lowers the water's oxidation-reduction potential (redox potential)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.5\" outer diameter × 12\" length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd\u003e1\/4\" FPT (female NPT) inlet and outlet — observe the flow-direction arrow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign Flow Rate\u003c\/td\u003e\n\u003ctd\u003e0.025 – 0.035 GPM (contact-time limited; not a high-flow filter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Capacity\u003c\/td\u003e\n\u003ctd\u003e500 – 1,000 gallons — typically 6 to 12 months, varies with water chemistry and use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Pressure\u003c\/td\u003e\n\u003ctd\u003e80 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Temperature\u003c\/td\u003e\n\u003ctd\u003e90°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eReverse-osmosis post-filter, for systems producing up to 50 GPD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImportant\u003c\/td\u003e\n\u003ctd\u003eCannot be used as a standalone water filter — polishing stage only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWHAT IT DOES\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eWhy Add It to an RO System\u003c\/h2\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eRestores What RO Removes\u003c\/h3\u003e\n\u003cp\u003eReverse osmosis takes out calcium and magnesium along with the contaminants. This bed dissolves a measured amount back in, so the water is not effectively mineral-free.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eRaises Acidic Permeate\u003c\/h3\u003e\n\u003cp\u003eRO water tends to sit slightly acidic. The calcite and corosex media lift pH by roughly 1 to 3 points toward a neutral-to-mild-alkaline range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eImproves the Taste\u003c\/h3\u003e\n\u003cp\u003eA trace of dissolved minerals is what makes water taste \"round\" instead of flat. Most people notice the difference in RO water right away.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eSealed, No-Mess Body\u003c\/h3\u003e\n\u003cp\u003eA fully sealed inline cartridge — no housing to open, no loose media to pour. When it is spent, you swap the whole unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eNeodymium Magnetic Module\u003c\/h3\u003e\n\u003cp\u003eThe cartridge begins with a high-strength neodymium magnetic module, part of the Aptera multi-stage media design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eStandard 1\/4\" Fit\u003c\/h3\u003e\n\u003cp\u003eThreaded 1\/4\" FPT ports accept common John Guest–style stems and elbows, so it drops into virtually any 1\/4\" RO line.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eINSTALLATION \u0026amp; USE\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eGetting Set Up\u003c\/h2\u003e\n\u003col class=\"install-steps\"\u003e\n\u003cli\u003eTurn off the RO feed water and open the faucet to relieve pressure. Locate the product-water tube that runs from the membrane housing outlet toward the storage tank — this is where the filter goes.\u003c\/li\u003e\n\u003cli\u003eThread your 1\/4\" fittings into both FPT ports (John Guest stem or elbow fittings are typical). Use a wrap of PTFE tape on the threads and do not overtighten the plastic ports.\u003c\/li\u003e\n\u003cli\u003eCut the permeate line and connect the filter with the flow-direction arrow pointing toward the tank. Secure the body with a mounting clip so it is not hanging on the tubing.\u003c\/li\u003e\n\u003cli\u003eTurn the feed water back on, check every connection for leaks, and let the system fill. Drain the first one or two tank-fills to flush any media fines before drinking.\u003c\/li\u003e\n\u003cli\u003ePlan to replace the cartridge every 6 to 12 months, or at 500–1,000 gallons — sooner if you notice the mineral taste or pH lift falling off.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e💡\u003c\/span\u003e\u003cstrong\u003eSlower is better here.\u003c\/strong\u003e Unlike most filters, low flow is a feature — the water needs contact time with the media to gain minerals and pH. That is why it belongs on the membrane's slow permeate line and not anywhere the water moves quickly. If your RO already has its own remineralizing stage, add this only if you want a further pH boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eCOMPATIBILITY \u0026amp; APPLICATIONS\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eWhere the Aptera AlkaMag Fits\u003c\/h2\u003e\n\u003cp\u003eThe AlkaMag inline works as an add-on to virtually any under-sink reverse-osmosis system producing 50 GPD or less, and is a straightforward upgrade for anyone whose RO water tastes flat or reads acidic on a pH test. Because it uses standard 1\/4\" FPT connections, it adapts to the 1\/4\" tubing on nearly every residential RO. It is a drinking-water polishing stage — pair it with a proper sediment\/carbon\/RO train, not in place of one. If your system uses a standard 10\" filter housing rather than an inline post-filter, the same AlkaMag media is also offered as the cartridge-style \u003cstrong\u003eAptera AlkaMag (APTERA-2510)\u003c\/strong\u003e, which drops into a 2.5\" × 10\" housing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefits-strip\"\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e🚚\u003c\/div\u003e\n\u003ch4\u003eShips from California\u003c\/h4\u003e\n\u003cp\u003eStocked in Santa Ana and shipped the same business day on orders placed before cut-off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e💧\u003c\/div\u003e\n\u003ch4\u003eGenuine Puregen Aptera\u003c\/h4\u003e\n\u003cp\u003eThe authentic Aptera AlkaMag inline cartridge — not a rebranded substitute.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e📞\u003c\/div\u003e\n\u003ch4\u003eSystem Help\u003c\/h4\u003e\n\u003cp\u003eNot sure where it goes on your RO, or which post-filter you need? Call \u003ca href=\"tel:(877)%20541-6603\"\u003e(877) 541-6603\u003c\/a\u003e and we will walk your system with you.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Puregen","offers":[{"title":"Default Title","offer_id":47755330945195,"sku":"APTERA-INLINE","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/IMG_8399.webp?v=1788674276","url":"https:\/\/www.isopurewater.com\/products\/puregen-aptera-alkamag-water-filter-2-5-x-12-inline-with-1-4-fip","provider":"Isopure Water","version":"1.0","type":"link"}