I have hard water. 228 CaCO3
To reduce this alkalinity I prefer to boil my water the night before rather than adding too much lactic acid. I use Bru'n Water as my addition calculator.
So i syphon off the cooled water leaving behind the chalk. I typical reduce the alkalinity to around 119 CaCO3. I then use this formula...
Ending Ca (ppm) = Starting Ca (ppm) - ((starting HCO3 (ppm) - ending HCO3 (ppm))/3.05) to calculate the resulting Calcium. Taken from mabrungard (https://www.homebrewersassociation.org/ ... pic=5792.0)
ANYWAY...
When i take the lid off the kettle in the morning, after its cooled, the surface of the water is covered in this...
https://i.imgur.com/OYyteoN.jpg (Someone will have to tell me how to get an image to show on here, I am pretty good with this sort of thing but I CANNOT figure out how to turn BBCode ON. Maybe because it's my first post? Please help, Ive tried for the last half hour, and searched this forum)
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And after I've syphoned the water off, the mineral (or whatever it is) from the surface sticks to the side of the kettle - it's not dust from the air as the lid is on all night....
https://i.imgur.com/1EMC3Zs.jpg
You can see where i've wiped it with my finger. What d'you think it is?
I wash it away! And with it maybe some important mineral. I know it's only a small amount in the scale of things but it bothers me. Especially when I go to all the effort of dialling in water reports and tweaking water profiles etc
???