{"product_id":"precipitated-chalk-calcium-carbonate-100g","title":"Precipitated Chalk (Calcium Carbonate) 100g","description":"\u003ch2\u003ePrecipitated Chalk (Calcium Carbonate) 100g\u003c\/h2\u003e\n\u003cp\u003eCalcium Carbonate (Precipitated Chalk) raises the pH of brewing liquor and musts, reducing acidity. In brewing, its use is generally limited to dark beers with high proportions of roasted grain such as stouts, where raising mash pH counteracts the acidity contributed by dark malts. In winemaking and cider making, it is used as a deacidifier to reduce excessive acidity from malic and tartaric acids.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e Adding Calcium Carbonate will produce CO2, which may cause foaming, and will throw a sediment. In winemaking, it is best added to the must (unfermented juice) before primary fermentation. For wine, 1g per gallon (4.5 litres) reduces acidity by approximately 1.5g ppt. For mash pH adjustment in dark beers, dose to pH test rather than a fixed rate. For reducing pH (increasing acidity), see \u003ca href=\"\/products\/lactic-acid-powder-50g\"\u003eLactic Acid Powder\u003c\/a\u003e or \u003ca href=\"\/products\/gypsum-100g-calcium-sulphate\"\u003eGypsum (Calcium Sulphate)\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eAt a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse: raises pH \/ reduces acidity in beer, wine, and cider\u003c\/li\u003e\n\u003cli\u003eBeer: suited to dark beers and stouts with high roasted grain content\u003c\/li\u003e\n\u003cli\u003eWine dosing: 1g per gallon (4.5L) reduces acidity by approx. 1.5 ppt\u003c\/li\u003e\n\u003cli\u003eCider: reduces effects of high malic acid\u003c\/li\u003e\n\u003cli\u003eNote: produces CO2 on addition (foaming) and throws sediment\u003c\/li\u003e\n\u003cli\u003ePack size: 100g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Harris Filters","offers":[{"title":"Default Title","offer_id":52626088329559,"sku":"4330","price":2.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0979\/5495\/5607\/files\/acid_reducer.jpg?v=1778852170","url":"https:\/\/www.home-brew-hopshop.co.uk\/products\/precipitated-chalk-calcium-carbonate-100g","provider":"The Hop Shop","version":"1.0","type":"link"}