{"product_id":"fritz-alkalinity-kh-test-kit-freshwater-saltwater","title":"Fritz Alkalinity (KH) Test Kit","description":"\u003cdiv style=\"background:#E3F2FD;border-left:4px solid #1E88E5;padding:10px 14px;margin:0 0 14px;font-size:0.95em;\"\u003e\n\u003cstrong\u003eIn-store pickup only.\u003c\/strong\u003e Pick up at \u003cstrong\u003e1885 Braselton Hwy, Suite D, Lawrenceville, GA\u003c\/strong\u003e.\n\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eFritz Alkalinity (KH) Test Kit\u003c\/strong\u003e is a liquid titration test that measures carbonate hardness (KH) — your aquarium's pH buffering capacity — in both freshwater and saltwater systems. Stable alkalinity is the single biggest factor behind stable pH, healthy coral growth, and a thriving African cichlid or planted tank. Pair with the rest of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater testing\u003c\/a\u003e kits and \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eadditives \u0026amp; supplements\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eWhy This Test Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-counting titration\u003c\/strong\u003e — accurate enough for reef tanks where 1 dKH matters and easy enough for first-time freshwater testers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks in freshwater and saltwater\u003c\/strong\u003e — one kit covers reef, FOWLR, African cichlids, planted tanks, and standard tropical communities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin down pH problems at the source\u003c\/strong\u003e — pH swings almost always trace back to low alkalinity; testing KH is faster than chasing pH crashes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReef-tank essential\u003c\/strong\u003e — alkalinity is one of the \"Big 3\" reef parameters (with calcium and magnesium); test 2–3 times per week when dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA\u003c\/strong\u003e by Fritz Aquatics, the brand behind our full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/fritz\"\u003eFritz lineup\u003c\/a\u003e of conditioners, salts, and additives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eRinse the included test tube with aquarium water, then fill to the marked line.\u003c\/li\u003e\n\u003cli\u003eAdd reagent drops one at a time, swirling after each drop, until the color changes per the kit's instructions.\u003c\/li\u003e\n\u003cli\u003eMultiply the drop count by the conversion factor on the label to get your KH\/alkalinity in dKH or meq\/L.\u003c\/li\u003e\n\u003cli\u003eRecord the result in your tank log and adjust dosing or water-change schedule as needed.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eTarget Ranges\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:6px 0 10px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#E3F2FD;\"\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eSystem Type\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eTarget KH (dKH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eReef (mixed \/ LPS)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e8–11 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eReef (SPS dominant)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e7.5–8.5 dKH (lower \u0026amp; stable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eFOWLR \u0026amp; standard saltwater\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e7–10 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eAfrican cichlids (Rift Lake)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e10–18 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003ePlanted \/ tropical community\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e3–8 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eDiscus \/ blackwater\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e1–4 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:6px 0 10px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;width:40%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eFritz Aquatics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eTests for\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eAlkalinity \/ Carbonate Hardness (KH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eMethod\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eLiquid reagent titration with drop-counting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eUnits\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003edKH (degrees) or meq\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eWater Type\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eFreshwater and Saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eIncludes\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eReagent, test tube, instructions with conversion chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;font-weight:600;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-rpm-liquid-pt-1-alkalinity-reef-supplement\"\u003eFritz RPM Liquid PT 1 Alkalinity\u003c\/a\u003e — dose alkalinity directly after testing reveals low KH.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-rpm-liquid-pt-2-calcium-reef-supplement\"\u003eFritz RPM Liquid PT 2 Calcium\u003c\/a\u003e — the calcium half of the reef \"Big 3\" you should test alongside KH.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-rpm-liquid-pt-3-magnesium-reef-supplement\"\u003eFritz RPM Liquid PT 3 Magnesium\u003c\/a\u003e — the third reef parameter; KH and Ca won't stay stable without magnesium in range.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-rift-lake-cichlid-buffer-african-cichlid-ph-kh\"\u003eFritz Rift Lake Cichlid Buffer\u003c\/a\u003e — raises pH and KH for African cichlid systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-master-test-kit-freshwater-saltwater-aquarium\"\u003eFritz Master Test Kit\u003c\/a\u003e — multi-parameter bundle if you want full coverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between KH and pH?\u003c\/strong\u003e\u003cbr\u003epH is the current acidity\/alkalinity reading at one moment. KH is the water's resistance to pH change — it's the buffer. Low KH means pH swings happen fast and crash hard; healthy KH keeps pH locked in place.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I test KH?\u003c\/strong\u003e\u003cbr\u003eReef tanks: 2–3 times per week, especially if you're dosing or running a calcium reactor. Freshwater: monthly is usually enough unless you're keeping species (discus, African cichlids) with strict requirements or you've seen pH swings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs dKH the same as alkalinity in ppm?\u003c\/strong\u003e\u003cbr\u003eThey measure the same thing in different units. 1 dKH ≈ 17.86 ppm CaCO₃ ≈ 0.357 meq\/L. The instructions include a conversion chart.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does my KH drop in a reef tank?\u003c\/strong\u003e\u003cbr\u003eCorals consume alkalinity as they build skeleton; CO₂ from gas exchange also lowers KH over time. Test, then dose alkalinity supplement to replace what's used.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use tap water if my KH is low?\u003c\/strong\u003e\u003cbr\u003eTap water KH varies widely by area. If your tap is high-KH, water changes alone can keep alkalinity stable in freshwater. For reef or low-KH freshwater species, RO\/DI plus targeted remineralization gives more control.\u003c\/p\u003e","brand":"Fritz","offers":[{"title":"Default Title","offer_id":48573453041883,"sku":"4006","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_b3bfe187-0022-4190-8c08-d68b4a8fbd50.png?v=1775565951","url":"https:\/\/squeakysaquatics.com\/products\/fritz-alkalinity-kh-test-kit-freshwater-saltwater","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}