{"title":"Hydrometers and refractometers","description":"\u003cp style=\"margin-bottom: .5rem;\"\u003e\u003cstrong\u003eAquarium hydrometers and refractometers\u003c\/strong\u003e measure water salinity, a fundamental parameter for the proper maintenance of marine tanks.\u003c\/p\u003e\n\u003cdetails style=\"margin: .5rem 0 1rem;\"\u003e\n\u003csummary style=\"display: inline-block; cursor: pointer; padding: .55rem 0; color: #006bb3; font-weight: 600;\"\u003eRead more\u003c\/summary\u003e\n\u003cdiv style=\"margin-top: .75rem; line-height: 1.6;\"\u003e\n\n\u003cp\u003eThe correct salinity is essential for the health of marine fish and corals. A stable value ensures conditions similar to natural ones and prevents stress or imbalances in the hosted organisms.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHydrometers\u003c\/strong\u003e are inexpensive and easy-to-use tools, suitable for quick checks. \u003cstrong\u003eRefractometers\u003c\/strong\u003e, on the other hand, offer greater precision and reliability thanks to optical reading, making them the ideal choice for expert aquarists and complex reef tanks.\u003c\/p\u003e\n\n\u003cp\u003eBoth are indispensable tools for anyone starting or managing a marine aquarium. For measurement range, precision, and usage, consult the \u003cstrong\u003eproduct sheets\u003c\/strong\u003e.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cp style=\"margin-top: 10px; font-style: italic;\"\u003eTip: Take regular measurements and always at the same water temperature; even small variations in salinity can negatively affect corals.\u003c\/p\u003e\n\u003cp\u003e— Tip from the Hobby Pesca \u0026amp; Acquari Team\u003c\/p\u003e","products":[{"product_id":"sera-marin-densimetro-misuratore-densita-e-salinita-acqua-marina","title":"SERA MARIN DENSIMETER - Seawater Density and Salinity Meter","description":"\u003cp\u003e\u003cstrong\u003eFor easy control of marine water density in your aquarium.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003ePrecisely measures marine water density\u003c\/li\u003e\n\n\u003cli\u003eDisplays salt content\u003c\/li\u003e\n\n\u003cli\u003eEasy to use with visual scale reading\u003c\/li\u003e\n\n\u003cli\u003eIdeal for marine aquariums\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdetails\u003e\n\u003csummary\u003e📖 Read more\u003c\/summary\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\n\u003cp\u003eSalinity (salt content) is deduced from the measured density. Since the salt content of marine water in the aquarium must be kept constant, the water needs to be checked regularly.\u003c\/p\u003e\n\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\n\u003cp\u003eThe water to be checked should be placed in a transparent glass that is deep enough, and the hydrometer should be inserted and read on a scale according to its immersion depth.\u003c\/p\u003e\n\n\u003c\/details\u003e","brand":"Sera","offers":[{"title":"Default Title","offer_id":46488975179939,"sku":"08910","price":8.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/3472\/5027\/files\/csm_9554-08910_-int-_sera-marin-araeometer_900f5ff295.png?v=1762441629"},{"product_id":"whimar-rifrattometro-con-led","title":"Whimar Refractometer with LED","description":"\u003cp\u003e\u003cstrong\u003eProfessional high-precision refractometer with integrated LED light and automatic temperature compensation (ATC) for measuring salinity and density in marine and brackish aquariums.\u003c\/strong\u003e Ensures clear, stable, and reliable readings even in dimly lit environments.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003e📖 Read more\u003c\/summary\u003e\u003ch3\u003eRefractometer Function\u003c\/h3\u003e\n\n\u003cp\u003eThe aquarium refractometer measures the salinity (concentration of dissolved salts) of water, a fundamental parameter in marine and reef aquariums.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eIntegrated LED light for optimal visibility in any condition\u003c\/li\u003e\n\n\u003cli\u003eATC (Automatic Temperature Compensation) for consistently precise measurements\u003c\/li\u003e\n\n\u003cli\u003eDual scale: Salinity (0–100‰) and Density (1.000–1.070 SG)\u003c\/li\u003e\n\n\u003cli\u003eBattery-powered LED with long life\u003c\/li\u003e\n\n\u003cli\u003eHigh-quality metal body and optical glass\u003c\/li\u003e\n\n\u003cli\u003eQuick and easy calibration\u003c\/li\u003e\n\n\u003cli\u003eIdeal for marine, reef, brackish aquariums, and saltwater preparation\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eCalibration Procedure\u003c\/h3\u003e\n\n\u003cp\u003eTo ensure maximum precision, calibrate before first use and periodically (every 1–2 weeks):\u003c\/p\u003e\n\n\u003col\u003e\n\n\u003cli\u003eClean the prism with a soft, dry cloth\u003c\/li\u003e\n\n\u003cli\u003eApply a drop of distilled or deionized water to the optical prism\u003c\/li\u003e\n\n\u003cli\u003eClose the clear cover and wait 30 seconds for the temperature to stabilize\u003c\/li\u003e\n\n\u003cli\u003eTurn on the LED to illuminate the reading field\u003c\/li\u003e\n\n\u003cli\u003eLook through the eyepiece: the line between the light and dark areas should be exactly at 0 (zero)\u003c\/li\u003e\n\n\u003cli\u003eIf necessary, adjust the calibration screw with the supplied screwdriver\u003c\/li\u003e\n\n\u003cli\u003eClean the prism with distilled water and dry thoroughly before measurement\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\n\u003cp\u003eFor maximum precision, you can use a 35 ppt calibration solution, setting the scale to that value instead of 0.\u003c\/p\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\n\u003col\u003e\n\n\u003cli\u003eTake a drop of water from the aquarium (temperature approx. 25°C)\u003c\/li\u003e\n\n\u003cli\u003ePlace it on the prism and close the cover\u003c\/li\u003e\n\n\u003cli\u003eTurn on the LED light and wait a few seconds\u003c\/li\u003e\n\n\u003cli\u003eLook through the eyepiece and read the salinity (ppt) or density (SG) value\u003c\/li\u003e\n\n\u003cli\u003eAfter each use, clean and thoroughly dry the prism\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\n\u003ch3\u003eAdvantages of the LED Model\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003ePerfect visibility even in dark or poorly lit environments\u003c\/li\u003e\n\n\u003cli\u003eMore stable and reflection-free measurements\u003c\/li\u003e\n\n\u003cli\u003eIndependent operation from ambient light\u003c\/li\u003e\n\n\u003cli\u003eAutomatic Temperature Compensation (ATC)\u003c\/li\u003e\n\n\u003cli\u003eRobust, practical, and easy-to-use design\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eType:\u003c\/strong\u003e Optical refractometer with LED\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMeasurement range:\u003c\/strong\u003e 0–100‰ (ppt) \/ 1.000–1.070 SG\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.001 SG\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTemperature compensation:\u003c\/strong\u003e Automatic (ATC 10–30°C)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eIllumination:\u003c\/strong\u003e Integrated LED (batteries included)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Aluminum and optical glass\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 195 × 40 mm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWeight:\u003c\/strong\u003e approx. 230 g\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e1× LED ATC Refractometer\u003c\/li\u003e\n\n\u003cli\u003e1× Pipette for water sample\u003c\/li\u003e\n\n\u003cli\u003e1× Screwdriver for calibration\u003c\/li\u003e\n\n\u003cli\u003e1× Hard protective case\u003c\/li\u003e\n\n\u003cli\u003e1× Cleaning cloth\u003c\/li\u003e\n\n\u003cli\u003e1× User manual in Italian\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaintenance and Tips\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eClean the prism after each use with distilled water\u003c\/li\u003e\n\n\u003cli\u003eDo not use aggressive or abrasive detergents\u003c\/li\u003e\n\n\u003cli\u003eStore in a dry place away from heat\u003c\/li\u003e\n\n\u003cli\u003eReplace LED batteries when brightness decreases\u003c\/li\u003e\n\n\u003cli\u003eRecalibrate regularly to maintain accuracy\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003c\/details\u003e\u003cp\u003e\u003cstrong\u003e💡 Expert Tip:\u003c\/strong\u003e Calibrate the refractometer every 1-2 weeks with distilled water or a 35 ppt solution to ensure consistently precise salinity measurements, a crucial parameter for the health of your marine aquarium inhabitants.\u003c\/p\u003e","brand":"Whimar","offers":[{"title":"Default Title","offer_id":47368472690851,"sku":"WR-33195","price":39.89,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/3472\/5027\/files\/Rifrattometro-Vista-Avanti-2-1.png?v=1772038554"}],"url":"https:\/\/hobbypescaeacquari.live\/en\/collections\/densimetri-e-rifrattometri.oembed","provider":"HobbyPesca","version":"1.0","type":"link"}