{"product_id":"jbl-proaqua-test-kh","title":"JBL ProAqua Test KH","description":"\u003cp id=\"p-rc_47d9015162ee8087-68\"\u003e\u003cspan class=\"citation-205\"\u003eThe \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-205\"\u003eJBL ProAqua Test KH\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-205 citation-end-205\"\u003e (Carbonate Hardness) is an essential, professional-grade liquid drop test designed to accurately measure the acid-binding capacity and carbonate hardness in freshwater aquariums, marine setups, and garden ponds.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-204 citation-end-204\"\u003eMaintaining proper carbonate hardness is critical because KH acts as a natural buffer system, preventing dangerous, rapid pH fluctuations that can stress or harm fish and live plants.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003eShort Description \u0026amp; Highlights\u003c\/h3\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-69\"\u003eThe JBL ProAqua Test KH utilizes a straightforward color-change titration method. \u003cspan class=\"citation-203 citation-end-203\"\u003eBy counting the drops of reagent added to a sample water vial until the color shifts cleanly from blue to yellow, hobbyists can directly read the exact hardness value (each drop corresponds to 1\u003c\/span\u003e\u003cspan class=\"citation-202 citation-end-202\"\u003e°dKH).\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e For beginner aquarists, this reliable test kit takes the guesswork out of water chemistry and ensures optimal conditions for fish health and CO2 injection. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Product Highlights:\u003c\/b\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eProduct Name\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eJBL ProAqua Test KH (Carbonate Hardness)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eWater Types\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFreshwater, Marine Aquariums, and Garden Ponds\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eTest Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLiquid Drop Titration (Color Change: Blue to Yellow)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eMeasurement Unit\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cspan class=\"math-inline\"\u003e1 drop = 1 dKH\u003c\/span\u003e (German hardness degrees)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eApplication Frequency\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOnce a week for new setups; once a month for established tanks\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eTarget Audience\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBeginner to Advanced Aquarists\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDetailed Beginner Guide \u0026amp; Usage Instructions\u003c\/h3\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-70\"\u003e\u003cb\u003e1. Why Carbonate Hardness Matters\u003c\/b\u003e\u003c\/p\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-70\"\u003eFor beginners, understanding KH is vital. \u003cspan class=\"citation-201 citation-end-201\"\u003eCarbonate hardness measures dissolved bicarbonates, serving as a chemical \"buffer\" that stabilizes your water's pH level.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e If KH drops too low (under \u003cspan class=\"math-inline\"\u003e3\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e5\u003c\/span\u003e°dKH), your tank becomes vulnerable to dangerous \"pH crashes.\" \u003cspan class=\"citation-200 citation-end-200\"\u003eIt is also crucial for planted tank hobbyists, as a stable KH ensures efficient and safe CO2 fertilization.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Step-by-Step Testing Procedure\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRinse the included plastic sample vial thoroughly with the water you intend to test.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFill the vial with exactly \u003cspan class=\"math-inline\"\u003e5ml\u003c\/span\u003e of aquarium water using the provided dosing syringe.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-71\"\u003e\u003cspan class=\"citation-199\"\u003eAdd the test reagent \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-199\"\u003edrop by drop\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-199 citation-end-199\"\u003e, swirling the vial gently after each drop, and count them.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-72\"\u003e\u003cspan class=\"citation-198\"\u003eContinue adding drops until the color changes distinctly from \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-198\"\u003eblue to yellow\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-198 citation-end-198\"\u003e.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-73\"\u003e\u003cspan class=\"citation-197 citation-end-197\"\u003eThe total number of drops added equals your carbonate hardness in °dKH (e.g., 5 drops = \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e5 dKH\u003c\/span\u003e\u003cspan class=\"citation-196 citation-end-196\"\u003e).\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e3. Interpreting Your Results\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_47d9015162ee8087-74\"\u003e\u003cb\u003eCommunity Freshwater Aquariums:\u003c\/b\u003e \u003cspan class=\"citation-195 citation-end-195\"\u003eGenerally optimal between \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e5\u003c\/span\u003e\u003cspan class=\"citation-194 citation-end-194\"\u003e to \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e12\u003c\/span\u003e\u003cspan class=\"citation-193 citation-end-193\"\u003e °dKH.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePlant-Heavy Aquascapes:\u003c\/b\u003e Typically maintained between \u003cspan class=\"math-inline\"\u003e3\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e8\u003c\/span\u003e °dKH to support steady plant growth and carbon uptake.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIf your readings fall outside these ranges, adjustments can be made safely using specialized mineral salts or routine partial water changes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JBL","offers":[{"title":"Default Title","offer_id":57204625211732,"sku":"2411000","price":11.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1052\/5828\/7444\/files\/JBLProAquaTestKH.jpg?v=1789761494","url":"https:\/\/www.tropicalmarineaquatic.com\/products\/jbl-proaqua-test-kh","provider":"Tropical Marine Aquatic","version":"1.0","type":"link"}