{"product_id":"hanna-instruments-checker-handheld-colorimeter-calcium","title":"Hanna Instruments Marine Checker - Calcium","description":"\u003cp\u003eHanna Instruments Checker Handheld Colorimeter for Calcium is a professional-grade digital colorimeter designed to deliver fast, accurate, and reliable calcium measurements in reef and marine aquariums. Calcium is a critical parameter in reef aquariums, playing an essential role in coral skeletal development, coralline algae growth, and the overall health of invertebrates and other reef inhabitants. Unlike traditional drop-based test kits that rely on subjective colour interpretation, the Hanna Checker eliminates human error by electronically reading and displaying precise calcium values in ppm (mg\/L), providing laboratory-quality accuracy in a compact and easy-to-use handheld device. Replacement reagent kits are available separately.\u003c\/p\u003e\n\u003cp\u003eTest Range: 200–600 ppm (mg\/L) | Method: Colorimetric | Compatible Reagents: HI 758-26 | Battery: 1.5V AAA\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":49370990641291,"sku":"TE-HI-0016","price":139.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0579\/8353\/3195\/files\/hanna-instruments-checker-handheld-colorimeterapex-aquatic-6485602.jpg?v=1789216696","url":"https:\/\/apexaquatic.com.au\/products\/hanna-instruments-checker-handheld-colorimeter-calcium","provider":"Apex Aquatic","version":"1.0","type":"link"}