Originally Posted by ajdelange
No such animal. You would supplement calcium with CaCl2 and/or CaSO4.
Not much. A tsp or tbsp per 5 gallons. It doesn't react. It's just there to provide something for the precipitating CaCO3 to grow on.
Not long. The reaction:
Ca++ + 2HCO3- ---> CaCO3 + CO2 + H2O
is pretty quick but you need to get the CO2 out for the reaction to proceed. In a small volume a couple of minutes should do. For 200 bbl you might need to boil longer than that.
Most people leave the water in the boiling vessel while it cools and settles then decant the cooled water off the precipitate and yes, you could do that when strike temperature is reached. Conceptually you could decant while the water is still hot (CaCO3 is actually less soluble in hot water than cold) but it does take some time for the stuff to settle out. I guess a fair criterion would be to decant as soon as the water is clear.
Thanks! I will buy the chemicals and will probably brew next weekend and report back in the topic of my ph measurements and stuff. I will measure only with a paper meter, i think it goes from ph 5 to 7 or something close.
Btw can i convert tsp/tbsp to grams? Also i will use dry powdered CaCl2 and chalk, is that good?