{"product_id":"red-sea-reefsense-salinity-calibration-solution","title":"Red Sea ReefSense Salinity Calibration Solution (53.1 mS, 5-Pack)","description":"\u003cp\u003e\u003cstrong\u003eRed Sea ReefSense Salinity Calibration Solution\u003c\/strong\u003e is the reference fluid that keeps your ReefControl salinity readings honest. Conductivity probes pick up biofilm and drift over time, and salinity is one parameter a reef cannot afford to have wrong. Each of the five single-use 20 mL foil sachets is pre-mixed to the seawater standard of 53.1 mS\/cm at 25 C, which is 35 PSU or 1.0264 specific gravity, so recalibrating the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefsense-salinity-temperature-probe\"\u003eReefSense Salinity \u0026amp; Temperature Probe\u003c\/a\u003e through the ReefBeat app takes a couple of minutes and lands exactly on natural seawater.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;color:#333;border-left:4px solid #006064;padding-left:8px;\"\u003eWhy You'll Love It\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural seawater standard.\u003c\/strong\u003e Calibrated to 53.1 mS\/cm (35 PSU) at 25 C, the salinity most reefs target.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealed and fresh.\u003c\/strong\u003e 20 mL single-use pouches eliminate evaporation and contamination that throw off opened bottles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApp-guided.\u003c\/strong\u003e Sized for the step-by-step calibration inside ReefBeat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive sachets.\u003c\/strong\u003e Plenty of calibration cycles for a year of maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;color:#333;border-left:4px solid #006064;padding-left:8px;\"\u003eHow to Calibrate\u003c\/h3\u003e\u003cp\u003eRinse the probe in RO\/DI water, let the sachet reach room temperature (readings are temperature compensated at 25 C), open ReefBeat, and follow the salinity calibration prompts. Recalibrate every one to two months or whenever the reading disagrees with a trusted refractometer.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;color:#333;border-left:4px solid #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;margin:8px 0;font-size:0.95em;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;background:#E0F7FA;width:42%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eRed Sea\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;background:#E0F7FA;width:42%;\"\u003ePart number\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eR35843\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;background:#E0F7FA;width:42%;\"\u003eContents\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e5 x 20 mL single-use sachets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;background:#E0F7FA;width:42%;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e53.1 mS\/cm at 25 C (35 PSU, 1.0264 SG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;background:#E0F7FA;width:42%;\"\u003eFor\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eReefSense Salinity \u0026amp; Temperature Probe (ReefControl ecosystem)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;background:#E0F7FA;width:42%;\"\u003eApplication\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:1.05em;font-weight:600;color:#333;border-left:4px solid #006064;padding-left:8px;\"\u003eComplete Your Setup\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefsense-salinity-temperature-probe\"\u003eReefSense Salinity \u0026amp; Temperature Probe\u003c\/a\u003e (the probe this solution calibrates)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefcontrol-pro-aquarium-controller\"\u003eReefControl Pro\u003c\/a\u003e or \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefcontrol-lite-aquarium-controller\"\u003eReefControl Lite\u003c\/a\u003e controllers, or the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefcontrol-pro-deluxe-kit\"\u003ePro Deluxe Kit\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefsense-single-probe-holder\"\u003eSingle Probe Holder\u003c\/a\u003e and \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reefsense-magnetic-4-probe-holder\"\u003eMagnetic 4-Probe Holder\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrowse all \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003esaltwater supplies\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;color:#333;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhy 53.1 mS?\u003c\/strong\u003e It is the conductivity of natural seawater at 35 PSU, so calibrating there puts the probe's best accuracy right at reef salinity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use a refractometer instead?\u003c\/strong\u003e A refractometer checks your water; this solution corrects the probe so its readings match. Use both.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSingle use only?\u003c\/strong\u003e Yes. Once opened, discard the sachet; never pour it back.\u003c\/p\u003e","brand":"Red Sea","offers":[{"title":"Default Title","offer_id":49312253313243,"sku":"R35843-T","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/257516-red-sea-reefsense-salinity-calibration-10pk__08814.1788272933.jpg?v=1789488442","url":"https:\/\/squeakysaquatics.com\/products\/red-sea-reefsense-salinity-calibration-solution","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}