{"product_id":"coralife-deep-six-hydrometer","title":"Deep Six Hydrometer — Accuracy ±0.001 Salinity and Specific Gravity 6 in - Coralife","description":"\u003cp\u003eThe Coralife Deep Six Hydrometer measures salinity and specific gravity in your marine aquarium with ±0.001 accuracy. Designed to collect a water sample at six inches deep, it avoids hand contamination and delivers a more reliable reading than surface samples.\u003c\/p\u003e\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e±0.001 specific gravity accuracy — each unit is individually calibrated and certified\u003c\/li\u003e\n\u003cli\u003eSamples water at 6 inches deep for a more representative salinity reading\u003c\/li\u003e\n\u003cli\u003eIntegrated bubble diffuser reduces reading errors caused by trapped air bubbles\u003c\/li\u003e\n\u003cli\u003eBuilt-in base allows hands-free reading on any flat surface\u003c\/li\u003e\n\u003cli\u003eDual scale: ppt (parts per thousand) and specific gravity (range 1.000 to 1.032)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to Use in a Marine Aquarium\u003c\/h2\u003e\n\u003cp\u003eSubmerge the Deep Six six inches below the water surface, let it fill, then remove it. Gently tap to release any air bubbles before reading. The hydrometer is calibrated for warm water aquariums between 68 °F and 85 °F (20–30 °C), the standard temperature range for reef and marine tanks. For a reef aquarium, aim for a specific gravity between 1.024 and 1.026.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAccuracy: ±0.001 specific gravity\u003c\/li\u003e\n\u003cli\u003eMeasurement range: 1.000 to 1.032\u003c\/li\u003e\n\u003cli\u003eCalibration: 68–85 °F (20–30 °C)\u003c\/li\u003e\n\u003cli\u003eReading: ppt and specific gravity\u003c\/li\u003e\n\u003cli\u003eDimensions: 5.5\" x 1\" x 8.7\"\u003c\/li\u003e\n\u003cli\u003eUPC: 096316008779\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Buy This Hydrometer from ReefSolution\u003c\/h2\u003e\n\u003cp\u003eThe Deep Six is an affordable and reliable tool for daily salinity monitoring. For greater precision, consider the \u003ca href=\"\/en\/products\/hanna-marine-salinity-tester\"\u003eHanna Marine Salinity Tester HI98319\u003c\/a\u003e. Pair with a quality salt mix like Red Sea Blue Bucket or Coral Pro Salt to maintain stable salinity. A digital thermometer is also recommended to confirm your water temperature falls within the hydrometer's calibration range.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eHow accurate is the Coralife Deep Six Hydrometer?\u003c\/h3\u003e\n\u003cp\u003eThe Deep Six is accurate to ±0.001 specific gravity. Each unit is individually calibrated and assigned its own certification number.\u003c\/p\u003e\n\u003ch3\u003eAt what temperature does the Deep Six give reliable readings?\u003c\/h3\u003e\n\u003cp\u003eIt is calibrated for warm water aquariums between 68 °F and 85 °F (20–30 °C). Readings outside this range may be inaccurate.\u003c\/p\u003e\n\u003ch3\u003eHydrometer or refractometer: which is better for a reef tank?\u003c\/h3\u003e\n\u003cp\u003eA hydrometer like the Deep Six is great for quick, affordable daily checks. For higher precision, especially in advanced reef tanks with SPS corals, the \u003ca href=\"\/en\/products\/hanna-marine-salinity-tester\"\u003eHanna Marine Salinity Tester HI98319\u003c\/a\u003e is recommended.\u003c\/p\u003e","brand":"Coralife","offers":[{"title":"Default Title","offer_id":46332677980331,"sku":"100108103","price":17.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/files\/hydrometer-2.png?v=1773950935","url":"https:\/\/reefsolution.com\/en\/products\/coralife-deep-six-hydrometer","provider":"Aquarium ReefSolution inc.","version":"1.0","type":"link"}