{"product_id":"mangrove-jacks-beer-yeast-empire-ale-m15","title":"Mangrove Jacks M15 Empire Ale Yeast 10g","description":"\u003cp\u003eM15 is an English ale yeast that produces the full-bodied, fruity, malt-forward character of classic British ales. High-flocculating and fast to clear, it leaves the residual sweetness and fruit complexity that English bitter, porter, and stout are built around.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eBest Suited To\u003c\/b\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eEnglish Bitter, Extra Special Bitter (ESB), English Pale Ale\u003c\/li\u003e \u003cli\u003ePorter, Stout, Brown Ale, Mild, Old Ale\u003c\/li\u003e \u003cli\u003eAny British ale where malt complexity and body are the point\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003eFermentation temp:\u003c\/strong\u003e 18–22°C (lower end for cleaner profile)\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eAttenuation:\u003c\/strong\u003e 70–75%\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eFlocculation:\u003c\/strong\u003e High\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eAlcohol tolerance:\u003c\/strong\u003e Up to 12% ABV\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003ePitching rate:\u003c\/strong\u003e 1 sachet per 23L at standard gravity\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cb\u003eWhen to Choose M15\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChoose M15 over S-04 when you want more ester character and a fuller flavour. S-04 is slightly cleaner and flocculates more firmly; M15 produces apple, pear, and stone-fruit notes that suit richer English styles well.\u003c\/p\u003e \u003cp\u003eChoose M15 over US-05 when you want British rather than American character — fuller body, more residual sweetness, and distinct fruitiness. US-05 is not the right yeast for a porter or ESB.\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePractical Notes\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eFerment at 18–19°C to keep ester character balanced. Fermenting above 20°C pushes M15 into stronger apple territory that works against the style. Keep it cool for the first few days of active fermentation.\u003c\/p\u003e \u003cp\u003eRehydrate in 10x its weight in 27°C water, or pitch directly. The high flocculation means the beer clears quickly without fining agents for most styles.\u003c\/p\u003e \u003cp\u003eKeep refrigerated. Once opened, reseal and use within 7 days.\u003c\/p\u003e \u003cp\u003e\u003cem\u003eReviewed by the AHB Brewing Team — June 2026.\u003c\/em\u003e\u003c\/p\u003e","brand":"Mangrove Jack's","offers":[{"title":"Default Title","offer_id":41994562043981,"sku":"25010","price":9.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/8306\/0045\/files\/25010.jpg?v=1754053190","url":"https:\/\/www.australianhomebrewing.com.au\/products\/mangrove-jacks-beer-yeast-empire-ale-m15","provider":"Australian Home Brewing","version":"1.0","type":"link"}