{"product_id":"seachem-reef-kalkwasser-500g-pure-calcium-hydroxide-for-reef-calcium-alkalinity-maintenance","title":"Seachem Reef Kalkwasser 500g — Pure Calcium Hydroxide for Reef Calcium \u0026 Alkalinity Maintenance","description":"\u003cdiv\u003e\n  \u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003eReef Kalkwasser is a high-purity calcium hydroxide designed for reef aquariums. When prepared as a limewater solution, it helps keep calcium at natural seawater levels in top-off water, supporting a stable foundation for calcifying corals and other invertebrates. Kalkwasser solutions address calcium directly while supporting carbonate alkalinity indirectly. The effectiveness of this approach depends on evaporation rates and ambient CO2 levels. If these factors limit performance, you can consider additional calcium or alkalinity supplements from Seachem—without mixing them directly into Kalkwasser solutions.\u003c\/p\u003e\n  \u003ch2\u003eWhat makes Reef Kalkwasser special\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVery pure calcium hydroxide for reef use\u003c\/li\u003e\n    \u003cli\u003eIdeal for increasing calcium in top-off water, helping maintain calcium levels\u003c\/li\u003e\n    \u003cli\u003eIncreases pH with no direct impact on carbonate alkalinity\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch2\u003eHow to use\u003c\/h2\u003e\n  \u003cp\u003ePrepare a Kalkwasser solution to top off evaporation losses in your reef tank. The rate at which calcium is maintained depends on evaporation and CO2 concentration; higher CO2 can reduce pH stability. If calcium or alkalinity reach stability challenges, you can add compatible supplements—such as Reef Advantage Calcium, Reef Complete, or Reef Calcium for calcium, along with Reef Builder or Reef Carbonate for alkalinity—without mixing them directly into Kalkwasser.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eTop-off dosing tips: establish a steady evaporation rate, then dose Kalkwasser gradually to maintain calcium levels.\u003c\/li\u003e\n    \u003cli\u003eCombination guidelines: use Kalkwasser as a calcium source and add compatible calcium or alkalinity supplements as needed, separately from Kalkwasser.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch2\u003eNotes and considerations\u003c\/h2\u003e\n  \u003cp\u003ePerformance will vary with system factors like evaporation and CO2. If you need additional calcium or carbonate alkalinity, consider the Seachem Reef family supplements as complementary options, ensuring you do not mix these products directly with Kalkwasser solutions.\u003c\/p\u003e\n\u003c\/div\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 Reef Kalkwasser used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Seachem Reef Kalkwasser provides pure calcium hydroxide to support calcium in reef top-off water and help maintain natural seawater levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are there mixing or compatibility notes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Avoid mixing Kalkwasser directly with carbonate alkalinity supplements; use as directed and consider additional calcium or alkalinity sources as needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":57199202173305,"sku":"B0002A5WOW","price":29.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/8934\/1049\/files\/seachem-reef-kalkwasser-container.jpg?v=1777773504","url":"https:\/\/petlyvox.com\/products\/seachem-reef-kalkwasser-500g-pure-calcium-hydroxide-for-reef-calcium-alkalinity-maintenance","provider":"petlyvox","version":"1.0","type":"link"}