Yummyrum wrote: ↑Mon Jan 29, 2024 3:29 pm
But yes , extra fizzing around a calcium carbonate source is due to the gas released as it reacts with the acidic environment in the fermentation .Finer Shell grit will release a lot more gas than say a few whole shells due to the significantly higher surface to volume of the Calcium Carbonate used .
Due to the water here being low on minerals, I don't rinse the dust off the grit before use.
The finer grit gets consumed during the first day or two, when the yeast is going crazy.
At first a sugar wash has very little buffering ability, ie the pH can be changed easily.
Once fermentation starts the pH can drop dramatically if something isn't done.
As the fermentation produces acid, it will react with the calcium and produce the buffer needed to keep the pH relatively constant.