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Was doing a bit of idle surfing yesterday and since I'm doing smaller batches, I got to wondering about how much Whirlfloc I really should be using. So here's the data I collected: A Whirlfloc tab weighs in at about 2.5 grams and the recommended dosage is 2 tabs per US barrel (31 gallons, or, as near as matters, a hectoliter (Okay, I know it's really 117.348 hectoliters)). Doing the math, it works out to 0.2 g/gallon (I'll stick to conventional units for volume from here on). Meaning my typical six gallon batches need about 1 gram of Whirlfloc. (0.16 grams/gallon). I've been overdosing by a factor of 2.5! My half-batches, by 5x! The Whirlfloc won't really hurt anything if overused (It will neutralize a bit of acidity - it has sodium bicarbonate to help it dissolve) but hey, since it's very hard to measure half a tab, I may as well grind them up and use Whirlfloc by weight.
Dosage per BSG's data sheet is 0.16 grams per gallon, or 0.04 g/liter. Time - the stuff degrades with time in the kettle. I've seen 15 minutes, I think I'll try 10.
I don't want to go back to straight Irish Moss (smells like Biloxi Bay at low tide) so I'll grind the tabs up and add by weight, unless anyone can tell me if there's a source of Whirlfloc powder out there....
Dosage per BSG's data sheet is 0.16 grams per gallon, or 0.04 g/liter. Time - the stuff degrades with time in the kettle. I've seen 15 minutes, I think I'll try 10.
I don't want to go back to straight Irish Moss (smells like Biloxi Bay at low tide) so I'll grind the tabs up and add by weight, unless anyone can tell me if there's a source of Whirlfloc powder out there....