{"product_id":"nyos-magnesium-reefer-test-kit-closeout","title":"Nyos Magnesium Reefer Test Kit - Closeout (Short-Dated)","description":"\u003cp style=\"padding:10px 12px;border:1px solid #F5C6CB;background:#FDECEA;border-radius:4px;\"\u003e\u003cstrong\u003eCloseout, short-dated stock.\u003c\/strong\u003e This is a clearance unit whose reagents are close to their date, offered at a reduced price. Looking for fresh stock? See the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/nyos-magnesium-reefer-test-kit\"\u003eNYOS Magnesium Reefer Test Kit\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eNyos Magnesium Reefer Test Kit\u003c\/strong\u003e is a precision titration kit that measures magnesium (Mg) in saltwater reef aquariums down to \u003cstrong\u003e15 mg\/L resolution\u003c\/strong\u003e, sharp enough to spot a slow drift before calcium and alkalinity start to fall apart. Made in Germany with reagents calibrated against AAS and NIST standards, it delivers laboratory-grade accuracy at a hobbyist price. Browse our full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater testing kits collection\u003c\/a\u003e or explore other \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003esaltwater reef supplies\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eWhy Magnesium Matters in a Reef Tank\u003c\/h3\u003e\n\u003cp\u003eMagnesium is the third leg of the calcium \/ alkalinity \/ magnesium triangle. Without enough Mg, calcium carbonate precipitates out of solution and your Ca and KH crash together, even when you're dosing them. Magnesium is also a structural component of stony coral and coralline algae skeletons, so it directly drives growth, color, and skeleton density in SPS, LPS, and clams.\u003c\/p\u003e\n\u003cp\u003eMost reef hobbyists target \u003cstrong\u003e1280-1350 mg\/L\u003c\/strong\u003e (natural seawater is ~1280 mg\/L), and SPS-heavy tanks running 2-part, calcium reactors, or kalkwasser often aim for \u003cstrong\u003e1350-1450 mg\/L\u003c\/strong\u003e. Whatever your target, you can't hit it without testing, and you can't react to a drift you can't see.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e~50 tests per kit\u003c\/strong\u003e, months of weekly testing on a single tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 mg\/L resolution\u003c\/strong\u003e, sharper than most hobby kits, catches slow drift early\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange up to 1600 mg\/L\u003c\/strong\u003e, covers natural seawater and elevated SPS reef levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-part titration\u003c\/strong\u003e with sharp pink-to-blue endpoint, easy to read, no guesswork\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGerman-made reagents\u003c\/strong\u003e calibrated against AAS and NIST standards (EN ISO 9001)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrated dropper and precision syringes\u003c\/strong\u003e for repeatable drop volume across tests\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for marine water\u003c\/strong\u003e, reagents account for interfering ions in saltwater\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 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 to Test\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eFill the supplied test vial to the marked line with tank water using the syringe.\u003c\/li\u003e\n\u003cli\u003eAdd Reagent \u003cstrong\u003eMG-1\u003c\/strong\u003e per the included pictogram instructions and swirl.\u003c\/li\u003e\n\u003cli\u003eAdd the measured scoop of \u003cstrong\u003eMG-2\u003c\/strong\u003e powder and swirl until dissolved, the sample turns pink.\u003c\/li\u003e\n\u003cli\u003eTitrate \u003cstrong\u003eMG-3\u003c\/strong\u003e drop by drop, swirling after each drop, until the color shifts from pink to clear blue.\u003c\/li\u003e\n\u003cli\u003eRead the magnesium concentration directly from the syringe scale.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eFor tanks dosing 2-part, calcium reactors, or kalkwasser, test \u003cstrong\u003eweekly\u003c\/strong\u003e. Stable, lightly stocked reef systems can usually get away with testing every 1-2 weeks, magnesium drops slowly compared to calcium and alkalinity.\u003c\/p\u003e\n\n\u003ch3 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\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;margin:8px 0;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eParameter Tested\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eWater Type\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSaltwater \/ Reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eMethod\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eThree-part titration (pink-to-blue endpoint)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eTests per Kit\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e~50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eUp to 1600 mg\/L (higher with dilution)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e15 mg\/L per scale division\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eReef Target Range\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e1280-1450 mg\/L (NSW ~1280)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eWhat's Included\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e3 reagent bottles (MG-1 50 mL, MG-2 5 g powder, MG-3 50 mL), 3 precision syringes, measuring spoon, test vial, calibrated dropper, instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eNyos (Germany)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eTR-MAG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 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 Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-foundation-pro-multi-test-kit-ca-alk-mg\"\u003eRed Sea Reef Foundation Pro Multi Test Kit (Ca, Alk, Mg)\u003c\/a\u003e, round out a full reef-parameter testing setup\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-calcium-pro-test-kit\"\u003eRed Sea Calcium Pro Test Kit\u003c\/a\u003e, pair Mg testing with calcium for the full picture\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/salifert-kh-alkalinity-test-kit\"\u003eSalifert KH \/ Alkalinity Test Kit\u003c\/a\u003e, KH is the third leg of the triangle, test it alongside Mg and Ca\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-foundation-c-magnesium-mg-500-ml-liquid\"\u003eRed Sea Reef Foundation C, Magnesium 500 mL\u003c\/a\u003e, dose this if your Mg comes back low\u003c\/li\u003e\n\u003cli\u003eBrowse all \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003ereef additives and supplements\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I test magnesium?\u003c\/strong\u003e\u003cbr\u003e\nWeekly is ideal for SPS-dominant tanks or any system actively dosing 2-part, calcium reactor effluent, or kalkwasser. Stable mixed reefs and softie tanks can usually test every 1-2 weeks. Magnesium falls slowly compared to Ca and Alk, but if it crashes, your other parameters will follow.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's the ideal magnesium level for a reef tank?\u003c\/strong\u003e\u003cbr\u003e\nNatural seawater sits around 1280 mg\/L. Most reefers target 1280-1350 mg\/L for mixed reefs, and 1350-1450 mg\/L for SPS-heavy systems running elevated calcium and alkalinity. Anything below ~1200 mg\/L starts to cause Ca\/Alk instability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow is this different from a Hanna or Salifert magnesium test?\u003c\/strong\u003e\u003cbr\u003e\nThe Nyos kit uses a true titration with a sharp pink-to-blue endpoint and 15 mg\/L resolution, finer than most hobby titration kits, and the endpoint is easier to read than a fading color match. Reagents are German-made and calibrated against laboratory standards, so batch-to-batch consistency is excellent.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes the kit work for freshwater?\u003c\/strong\u003e\u003cbr\u003e\nNo. The reagents are formulated for saltwater chemistry, interfering ions in marine water are accounted for. Use a freshwater-specific magnesium kit if you're testing planted-tank or African cichlid water.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow long do the reagents last?\u003c\/strong\u003e\u003cbr\u003e\nSealed and stored at room temperature out of direct sunlight, Nyos reagents typically remain accurate for 1-2 years. Once opened, use within ~12 months for best precision and replace if the color of MG-1 or MG-3 looks off.\u003c\/p\u003e","brand":"Nyos","offers":[{"title":"Default Title","offer_id":48736511099099,"sku":"CLR-NYOS-MGR","price":15.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_71ba4b7a-9187-47ff-ae50-1d49f4892bb4.png?v=1777726780","url":"https:\/\/squeakysaquatics.com\/products\/nyos-magnesium-reefer-test-kit-closeout","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}