{"product_id":"tropic-marin-hydrometer-with-measuring-cylinder","title":"Tropic Marin High-Precision Hydrometer with Measuring Cylinder","description":"\u003cp\u003e\u003cstrong\u003ePrecise specific gravity readings, with the cylinder to take them in.\u003c\/strong\u003e This kit pairs the Tropic Marin High-Precision Hydrometer with Tropic Marin's matching measuring cylinder. Specific gravity is one of the most important water parameters in a saltwater tank, and many animals are sensitive to even small changes, so it pays to measure it accurately. The transparent cylinder has a stable base and a spout, and at 36 cm (14 in) tall it is sized for taking readings with the hydrometer. Already have the hydrometer? The \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/tropic-marin-hydrometer\"\u003eTropic Marin Hydrometer\u003c\/a\u003e is also sold on its own. Browse more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater testing\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTropic Marin High-Precision Hydrometer\u003c\/li\u003e\n\u003cli\u003eTropic Marin Measuring Cylinder (transparent plastic, stable base, spout, 36 cm \/ 14 in tall)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eHow to Measure\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eFill the measuring cylinder with no more than 400 mL of saltwater at 25 °C \/ 77 °F.\u003c\/li\u003e\n\u003cli\u003eMake sure the hydrometer is dry and clean, then gently place it in the water until it floats freely.\u003c\/li\u003e\n\u003cli\u003eRead the specific gravity on the blue part of the scale at the level of the water surface, not at the meniscus, which creeps higher at the edges.\u003c\/li\u003e\n\u003cli\u003eRinse the cylinder well with fresh tap or RO water after each use to remove salt residue that could throw off future readings.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eTemperature matters.\u003c\/strong\u003e Specific gravity drops as temperature rises, so the water should be at 25 °C \/ 77 °F for a correct result.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 6px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:6px 0 12px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;width:40%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eTropic Marin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;\"\u003eScale\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e1.021 to 1.031 specific gravity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e0.0001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;\"\u003eMaximum Deviation\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e0.001 at 25 °C \/ 77 °F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;\"\u003eRecommended Range\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e1.025 to 1.027 at 25 °C \/ 77 °F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;\"\u003eCylinder\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eTransparent plastic, 36 cm (14 in) tall, fill to max. 400 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;background:#E0F7FA;font-weight:600;\"\u003eFor\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSaltwater 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;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat specific gravity should my reef be?\u003c\/strong\u003e\u003cbr\u003eNatural seawater at 35 ppt is 1.026 at 25 °C \/ 77 °F. Tropic Marin recommends 1.025 to 1.027 for aquarium water, depending on the type of tank.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does the water temperature matter?\u003c\/strong\u003e\u003cbr\u003eSpecific gravity decreases as temperature increases. Measure at 25 °C \/ 77 °F so the reading matches the hydrometer's scale.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere do I read the scale?\u003c\/strong\u003e\u003cbr\u003eAt the flat water surface, not at the meniscus where the water curves up the glass.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is this different from the hydrometer alone?\u003c\/strong\u003e\u003cbr\u003eThis kit adds Tropic Marin's measuring cylinder, so you have a steady, purpose-sized vessel to float the hydrometer in. The \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/tropic-marin-hydrometer\"\u003ehydrometer by itself\u003c\/a\u003e is also available.\u003c\/p\u003e\n","brand":"Tropic Marin","offers":[{"title":"Default Title","offer_id":50900584300763,"sku":"TM51022","price":79.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/TM51022-2__10862.1784893431.jpg?v=1792693190","url":"https:\/\/squeakysaquatics.com\/products\/tropic-marin-hydrometer-with-measuring-cylinder","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}