{"product_id":"ntlabs-magnesium-test-kit","title":"NTlabs Magnesium Test Kit","description":"\u003cp data-start=\"210\" data-end=\"534\"\u003eMaintain stable water chemistry in your reef or marine aquarium with this magnesium-specific test kit from NT Labs. The test measures magnesium concentration — a critical element that helps marine invertebrates, corals, and other reef life properly absorb calcium and build skeletons.\u003c\/p\u003e\n\u003cp data-start=\"536\" data-end=\"914\"\u003eThe kit uses a titration method for accuracy: you add the provided reagents to a water sample, then slowly titrate until the colour shifts, giving you a precise reading in mg\/L (ppm). It includes everything you need — test vial, reagents, and clear instructions — and covers about \u003cstrong data-start=\"855\" data-end=\"867\"\u003e35 tests\u003c\/strong\u003e total.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"916\" data-end=\"1200\"\u003eRegular use of this test helps ensure your magnesium stays around the natural seawater level (about 1300–1400 mg\/L), which prevents calcium and carbonate from precipitating and helps maintain stable pH and bioavailability of essential minerals.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1202\" data-end=\"1362\"\u003eWhether used as part of a full testing regime or on its own, the NT Labs Magnesium Test Kit is a simple and reliable tool for ongoing reef-aquarium maintenance.\u003c\/p\u003e","brand":"Marine Fish Shop Online","offers":[{"title":"Default Title","offer_id":52011264180565,"sku":null,"price":11.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/2278\/0501\/files\/magnesiumtest.webp?v=1764622572","url":"https:\/\/marinefishshop.uk\/products\/ntlabs-magnesium-test-kit","provider":"Marine Fish Shop Online","version":"1.0","type":"link"}