SO2: Laffort Effervescent Tablets

Effervescent SO2 ("sulfite") tablets are cool. I bought these packs primarily for SO2 additions in the barrel post fermentation. They are a measured mix of 66.6% potassium metabisulfite and 33.3% potassium bicarbonate and work like Alka Seltzer. I bought both the 2g and 5g size tablets. The 5g tablet is primarily intended for a standard 225L barrel and will yield the desired sulfite content of around 22 ppm. I bought the smaller 2g tablets in order to make minor adjustments if necessary.



Here's the info from the product brochure:

Oenosteryl Effervescent Tablets™ are a blend of potassium metabisulfite and
potassium bicarbonate. They are packaged in 2 g (48/box) and 5 g (48/box) dosage
levels. The effervescent action of the bicarbonate provides mixing in barrels or
small tanks while reducing time and labor needed for stirring. The easy-to-use
tablet form helps prevent overdose problems associated with other forms of SO2
additions. Sealed strip packages keep unused tablets fresh for optimal potency.
Cellar workers and others in the immediate area require no safety equipment
because the tablets are solid and odorless. The potassium bicarbonate fraction
in these tablets has little or no effect on pH.