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Of course the filter takes out -roughly said- some of the character of your water, the bigger parts are filtered out. By just tasting the before and after results you will note the difference (or not). The smaller parts inside the water (e.g. other minerals and the added cleaners like chlorine) will not disappear. In some tap water you will still find the ...


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If you're insistent on testing it yourself, aquarium supply places purportedly have testing kits, but I haven't looked into them. You can also send a (pre- or post-filtered) sample to Ward Labs, who have multiple specific homebrewer water tests for $30-40. As Denny mentions, doing this on a multi-year period (or if you feel/know that things are changing due ...


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Gypsum does two things: It releases calcium ions into the mash, which combine with phosphates from the grain to create an acid, thus acidifying the mash. It provides sulphate ions which contribute a flavour. It's widely reported that sulphates accentuate hop bitterness and give a slight saltiness to the beer. If you took all your gypsum and added it only ...



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