{"product_id":"refractometer-hydrometer-calibration-standard-250ml","title":"Brightwell Aquatics Refractometer \u0026 Hydrometer Calibration Standard (250ml)","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eGUARANTEED ACCURATE SALINITY TESTING - Calibrates refractometers and hydrometers to ideal 35 ppt salinity and 1.026 specific gravity for marine tanks. OPTIMIZED FOR MARINE AQUARIUMS - Ensures accurate salinity adjustments critical for coral health and saltwater fish comfort in reef aquariums. DUAL-PURPOSE CALIBRATION SOLUTION - Works with both refractometers and swing-arm hydrometers—designed specifically for saltwater aquarium use. LAB-GRADE QUALITY STANDARD FLUID - Made with precision-tested ingredients for consistent results—supports proper aquarium salinity and water chemistry. AMERICAN-MADE EXCELLENCE - Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesigned for aquarium, reef, freshwater, or planted aquarium use depending on product line.\u003c\/li\u003e\n\u003cli\u003eManufacturer SKU: RES250\u003c\/li\u003e\n\u003cli\u003eUPC: 810086019083\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Brightwell Aquatics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Aquarium Water Additives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e RES250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Brightwell Aquatics","offers":[{"title":"Default Title","offer_id":51869864755521,"sku":"RES250","price":18.83,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/8968\/2497\/files\/RefractometerandHydrometerCalibrationStandard_10in.png?v=1782026911","url":"https:\/\/lawnandpets.com\/products\/refractometer-hydrometer-calibration-standard-250ml","provider":"Lawn and Pets","version":"1.0","type":"link"}