{"product_id":"tropical-test-gh-kh","title":"Tropical TEST GH\/KH General \u0026 Carbonate Hardness Test Kit","description":"\u003cp\u003eThe Tropical TEST GH\/KH is a titrimetric water testing kit designed to measure both general hardness (GH) and carbonate hardness (KH) in aquariums and ponds. It is aimed at fishkeepers who need accurate hardness readings to maintain stable, species-appropriate water conditions.\u003c\/p\u003e\u003ch3\u003eHow It Works\u003c\/h3\u003e\u003cp\u003eTesting uses a titrimetric method — add the reagent solution drop by drop until a colour change occurs. Each drop of reagent corresponds directly to one German degree of hardness, so reading your result is straightforward: count the drops, get your value in °dGH or °dKH.\u003c\/p\u003e\u003ch3\u003eWhy GH and KH Matter\u003c\/h3\u003e\u003cp\u003eGeneral hardness reflects the concentration of dissolved calcium and magnesium ions, while carbonate hardness indicates the buffering capacity of your water. Many species tolerate a broad hardness range, but for those that do not — particularly species with specific breeding requirements — keeping GH and KH within the correct parameters is essential for long-term health. Carbonate hardness also plays a direct role in pH stability: higher KH buffers pH more effectively, but can make intentional pH adjustment more difficult when required.\u003c\/p\u003e\u003ch3\u003eWhat's Tested\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGeneral hardness (GH) measured in °dGH\u003c\/li\u003e\n\u003cli\u003eCarbonate hardness (KH) measured in °dKH\u003c\/li\u003e\n\u003cli\u003eSuitable for use in aquariums and ponds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor a complete picture of water chemistry, the Tropical TEST GH\/KH works alongside other tests in the Tropical range. Used consistently, it gives you the data needed to make informed decisions about water preparation and conditioning before issues have a chance to develop.\u003c\/p\u003e","brand":"Peregrine","offers":[{"title":"Default Title","offer_id":54146864873809,"sku":"1VTK030","price":10.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/0403\/8225\/files\/1VTK030_1.jpg?v=1782486855","url":"https:\/\/viperia.co.uk\/products\/tropical-test-gh-kh","provider":"Viperia UK","version":"1.0","type":"link"}