{"product_id":"squeakys-aquatics-saltwater-refractometer","title":"Squeaky's Aquatics Saltwater Refractometer","description":"\n\u003cp\u003eDial in your reef with confidence. The Squeaky's Aquatics Saltwater Refractometer gives you a fast, accurate reading of your aquarium's salinity and specific gravity, the single most important parameter for a healthy marine or reef tank. It reads far more accurately than a plastic swing-arm hydrometer and arrives ready to use with everything you need. Pair it with our \u003ca href=\"\/collections\/salt-mixes\"\u003ereef salt mixes\u003c\/a\u003e and \u003ca href=\"\/collections\/water-testing\"\u003etest kits\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.08em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"margin:4px 0 4px 18px;padding:0;line-height:1.5;\"\u003e\n\u003cli\u003eDual scale reads both salinity (0 to 100 ppt) and specific gravity (1.000 to 1.070)\u003c\/li\u003e\n\u003cli\u003eAutomatic Temperature Compensation (ATC) for reliable readings at room temperature\u003c\/li\u003e\n\u003cli\u003eHand-held optical design, just add a few drops of water and look through the eyepiece\u003c\/li\u003e\n\u003cli\u003eAdjustable focus and a calibration screw for easy zeroing\u003c\/li\u003e\n\u003cli\u003eFar more accurate and repeatable than plastic swing-arm hydrometers\u003c\/li\u003e\n\u003cli\u003eIncludes the refractometer, calibration screwdriver, pipette, and a protective hard case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.08em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eHow To Use\u003c\/h3\u003e\n\u003cp\u003eCalibrate first: place a few drops of RO\/DI or pure water on the prism, close the daylight plate, and turn the calibration screw until the boundary line sits on zero. Wipe dry, then add a few drops of tank water, close the plate, and hold the eyepiece toward a light source. Read where the blue and white boundary crosses the salinity or specific gravity scale. Rinse and dry the prism after each use.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.08em;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;width:100%;max-width:540px;font-size:0.95em;margin:6px 0;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;width:40%;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eHand-held optical refractometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eMeasures\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSalinity and specific gravity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eSalinity range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e0 to 100 ppt (parts per thousand)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eSpecific gravity range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e1.000 to 1.070\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003ePlus or minus 1 ppt \/ 0.001 SG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eTemperature compensation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eAutomatic (ATC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eRefractometer, calibration screwdriver, pipette, hard case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eBest for\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSaltwater and reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.08em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003ePairs Well With\u003c\/h3\u003e\n\u003cul style=\"margin:4px 0 4px 18px;padding:0;line-height:1.5;\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/salt-mixes\"\u003eReef salt mixes\u003c\/a\u003e for accurate mixing and top-off\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/water-testing\"\u003eSaltwater test kits\u003c\/a\u003e to round out your parameters\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/salt-water\"\u003eMore saltwater and reef essentials\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.08em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eWhy use a refractometer instead of a hydrometer?\u003c\/strong\u003e\u003cbr\u003eA refractometer measures the actual refraction of light through your water, so it is far more accurate and consistent than a floating or swing-arm hydrometer, which can drift with bubbles and buildup.\u003c\/p\u003e\n\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eDo I need to calibrate it?\u003c\/strong\u003e\u003cbr\u003eYes. Calibrate to zero with RO\/DI or pure water before use, and re-check periodically. Calibration fluid can be used for the most precise results.\u003c\/p\u003e\n\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eDoes the ATC matter?\u003c\/strong\u003e\u003cbr\u003eYes. Automatic Temperature Compensation adjusts the reading for normal room-temperature swings so your salinity number stays reliable.\u003c\/p\u003e\n\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eIs it for saltwater only?\u003c\/strong\u003e\u003cbr\u003eIt is designed for measuring marine salinity and specific gravity, making it ideal for saltwater and reef aquariums.\u003c\/p\u003e","brand":"Squeaky's Aquatics","offers":[{"title":"Default Title","offer_id":49209544573147,"sku":"RF50003","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/RF50003-2.png?v=1788263229","url":"https:\/\/squeakysaquatics.com\/products\/squeakys-aquatics-saltwater-refractometer","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}