{"product_id":"hanna-marine-magnesium-checker-reagents-hi783-25-25-pre-measured-tests","title":"Hanna Marine Magnesium Checker Reagents HI783-25 – 25 Pre-Measured Tests","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe HI783-25 Marine Magnesium Checker reagents are replacement packs designed to work with the Hanna Marine Magnesium Checker HC (HI783). Each packet is pre-measured and clearly labeled with lot numbers and expiration dates for traceability, helping you stay organized as you test saltwater magnesium levels.\u003c\/p\u003e\u003cp\u003eDesigned as replacement reagents, HI783-25 emphasizes ease of use, accuracy, and quality. The reagents are prepared with high purity chemicals and are packaged to support quick testing without manual solution prep. The colorimetric EDTA method uses a calmagite indicator; when magnesium in the sample reacts with the reagent, the sample shifts from blue toward violet, and that color is read as magnesium concentration by the HI783 instrument.\u003c\/p\u003e\u003ch3\u003eWhat makes them useful\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePre-made reagents for ease of use\u003c\/li\u003e\n\u003cli\u003ePrepared with high purity chemicals\u003c\/li\u003e\n\u003cli\u003eMarked with expiration date and lot number for traceability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow it works\u003c\/h3\u003e\u003cp\u003eTo test, simply add the HI783-25 reagent packet to your prepared sample. The color change indicates the magnesium level, and the instrument reports the result in ppm. This setup is designed for fast, repeatable readings in saltwater samples.\u003c\/p\u003e\u003ch3\u003eTypical range and use\u003c\/h3\u003e\u003cp\u003eThe reagents are tailored for saltwater tests with an expected magnesium range of 1,000 to 1,800 ppm. This makes them suitable for routine monitoring in marine aquariums or reef setups where stable magnesium tracking matters.\u003c\/p\u003e\u003ch3\u003eTips for best results\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStore packets in a cool, dry place and check the expiration date before use\u003c\/li\u003e\n\u003cli\u003eKeep packets sealed and use them in the order indicated by lot numbers\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith HI783-25 you gain reliable, ready-to-use reagents that support efficient, traceable testing. The emphasis on pre-measured portions and clear labeling helps simplify inventory and testing in hobbyist and professional marine setups.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is HI783-25 used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: HI783-25 provides pre-measured reagents for the Hanna Marine Magnesium Checker, enabling colorimetric magnesium measurements in saltwater samples.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What range does it cover?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Suitable for saltwater magnesium around 1,000 to 1,800 ppm, with results reported in ppm.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57205643084153,"sku":"B0B33C2FBW","price":43.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/8934\/1049\/files\/hanna-marine-magnesium-checker-reagents-25-tests.jpg?v=1777836316","url":"https:\/\/petlyvox.com\/products\/hanna-marine-magnesium-checker-reagents-hi783-25-25-pre-measured-tests","provider":"petlyvox","version":"1.0","type":"link"}