{"product_id":"instant-ocean-aquarium-hydrometer","title":"Instant Ocean Aquarium Hydrometer","description":"\u003cp\u003eThe Instant Ocean Aquarium Hydrometer is a simple, reliable way to measure the specific gravity and salinity of your saltwater aquarium. Just fill it with tank water and read the easy swing-arm indicator, no calibration or guesswork needed. An essential tool for mixing salt and keeping your \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003esaltwater\u003c\/a\u003e tank stable.\u003c\/p\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMeasures specific gravity and salinity at a glance\u003c\/li\u003e\n\u003cli\u003eEasy-to-read swing-arm indicator\u003c\/li\u003e\n\u003cli\u003eNo calibration required\u003c\/li\u003e\n\u003cli\u003eDurable and simple to use\u003c\/li\u003e\n\u003cli\u003eA must-have for mixing salt water\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFill the chamber with aquarium or freshly mixed salt water\u003c\/li\u003e\n\u003cli\u003eTap out any air bubbles clinging to the swing arm\u003c\/li\u003e\n\u003cli\u003eRead the salinity and specific gravity where the arm settles\u003c\/li\u003e\n\u003cli\u003eRinse in fresh water after each use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;margin:6px 0 4px;font-size:0.95em;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f5f5f5;font-weight:600;width:40%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eInstant Ocean\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f5f5f5;font-weight:600;width:40%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eSwing-arm hydrometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f5f5f5;font-weight:600;width:40%;\"\u003eMeasures\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eSpecific gravity and salinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f5f5f5;font-weight:600;width:40%;\"\u003eBest for\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eSaltwater and reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003ePair It With\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFor higher precision, step up to a \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/milwaukee-ma887-digital-salinity-refractometer\"\u003esalinity refractometer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eMix water with \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-mixes\"\u003esalt mixes\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrowse more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003etesting\u003c\/a\u003e gear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does it measure?\u003c\/strong\u003e\u003cbr\u003eThe specific gravity and salinity of your saltwater, so you can keep it in the right range for fish and corals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat salinity should I target?\u003c\/strong\u003e\u003cbr\u003eMost reef tanks target a specific gravity around 1.025. Fish-only tanks can run a little lower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to calibrate it?\u003c\/strong\u003e\u003cbr\u003eNo. Just rinse it after use and tap off any air bubbles for an accurate reading.\u003c\/p\u003e","brand":"Instant Ocean","offers":[{"title":"Default Title","offer_id":48113404805339,"sku":"35002503","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/5091634.webp?v=1767880241","url":"https:\/\/squeakysaquatics.com\/products\/instant-ocean-aquarium-hydrometer","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}