{"product_id":"reef-pure-reverse-osmosis-membrane","title":"Reef Pure Reverse Osmosis Membrane","description":"\u003cp\u003e\u003cstrong\u003eThe membrane that does the actual filtering in an RO\/DI system.\u003c\/strong\u003e This is a Pure-Pro TW30-1812 thin-film composite (TFC) reverse osmosis membrane, sold by Reef Pure in the standard 1812 housing size, in 50 GPD and 200 GPD production ratings. It rejects at least 96% of dissolved solids from tap water (98% typical), turning ordinary tap water into the low-TDS feed a reef tank or a DI stage needs to finish properly.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThin-film composite construction\u003c\/strong\u003e — the same membrane technology used across quality residential and aquarium RO units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e96% minimum salt rejection\u003c\/strong\u003e (98% typical), tested at 80 psi feed pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1812 housing fit\u003c\/strong\u003e — 298 mm long, 22 mm diameter — drops into any RO housing built to that common size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo production ratings\u003c\/strong\u003e — 50 GPD for smaller systems, 200 GPD where you need water faster or are feeding a larger system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eReef Pure RO (Pure-Pro TW30-1812)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMembrane type\u003c\/th\u003e\n\u003ctd\u003ePolyamide thin-film composite (TFC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSalt rejection\u003c\/th\u003e\n\u003ctd\u003e96% minimum, 98% typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptimal operating pressure\u003c\/th\u003e\n\u003ctd\u003e50–100 psi (max 100 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum operating temperature\u003c\/th\u003e\n\u003ctd\u003e45°C (tested at 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum feed flow\u003c\/th\u003e\n\u003ctd\u003e7.6 L\/minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChlorine tolerance\u003c\/th\u003e\n\u003ctd\u003eUnder 0.1 ppm free chlorine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e298 mm long, 22 mm diameter — standard 1812 housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhich rating do I need?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eRating\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eProduction at 80 psi\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 GPD\u003c\/td\u003e\n\u003ctd\u003eAA0563\u003c\/td\u003e\n\u003ctd\u003e50 GPD (approx. 7.9 L\/h)\u003c\/td\u003e\n\u003ctd\u003e$49.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e200 GPD\u003c\/td\u003e\n\u003ctd\u003eAA0562\u003c\/td\u003e\n\u003ctd\u003e200 GPD (approx. 31.5 L\/h)\u003c\/td\u003e\n\u003ctd\u003e$149.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eBoth figures are the manufacturer's rating at 80 psi feed pressure and 25°C on 250 ppm test water — actual output on your tap water will vary with your household water pressure and temperature, and typically falls as the membrane ages. Reef Pure doesn't publish a full pressure-versus-output curve, only the single 80 psi test figure, so treat these numbers as a guide rather than a guarantee.\u003c\/p\u003e\n\u003ch3\u003eWill it fit my setup?\u003c\/h3\u003e\n\u003cp\u003eAny RO housing built to the standard 1812 size (298 mm x 22 mm) will take this membrane — it's a like-for-like replacement for most household and aquarium RO units of that size, not just Reef Pure's own systems.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e mains tap water feed, freshwater or marine end use — the membrane doesn't know or care what the water is destined for.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e feed water above 45°C, feed pressure above 100 psi, or chlorinated water above 0.1 ppm without pre-filtration — chlorine will damage the membrane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eKeep the membrane wet at all times once it's been wetted — Reef Pure warns against letting it dry out, which damages the thin-film layer permanently. Discard the first 45 minutes of permeate after fitting a new membrane before using the water. Reef Pure doesn't publish a fixed replacement interval; monitor your permeate TDS and replace once rejection noticeably drops.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/products\/reef-pure-mixed-bed-colour-indicating-di-resin\"\u003eReef Pure Mixed Bed Colour Indicating DI Resin\u003c\/a\u003e for the polishing stage after this membrane.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by the manufacturer against faults in materials and workmanship, in addition to your rights under Australian Consumer Law. Standard shipping — both ratings are small, light items with no special freight requirements.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat's the difference between the 50 GPD and 200 GPD versions?\u003c\/h4\u003e\n\u003cp\u003eProduction rate only — both are the same TW30-1812 membrane technology with the same 96% minimum rejection. The 200 GPD version simply produces water faster, which suits larger systems or households wanting quicker refill.\u003c\/p\u003e\n\u003ch4\u003eWill I actually get 50 (or 200) gallons a day?\u003c\/h4\u003e\n\u003cp\u003eThat figure is the manufacturer's rating at 80 psi and 25°C on standard test water. Real-world output depends on your household water pressure and temperature and will typically be lower if your mains pressure is under 80 psi.\u003c\/p\u003e\n\u003ch4\u003eDoes this fit my existing RO unit?\u003c\/h4\u003e\n\u003cp\u003eIf your housing is the standard 1812 size (298 mm x 22 mm) — the most common size in household and aquarium RO units — yes.\u003c\/p\u003e\n\u003ch4\u003eDo I need to do anything before first use?\u003c\/h4\u003e\n\u003cp\u003eDiscard the first 45 minutes of permeate after installation, and never let the membrane dry out once it's been wetted.\u003c\/p\u003e","brand":"Reef Pure RO","offers":[{"title":"50 gpd","offer_id":55242268868899,"sku":"AA0563","price":49.95,"currency_code":"AUD","in_stock":false},{"title":"200 gpd","offer_id":55335352336675,"sku":"AA0562","price":149.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/reef-pure-reverse-osmosis-membrane-50-gpd-3144-1600.jpg?v=1781836186","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/reef-pure-reverse-osmosis-membrane","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}