Originally Posted by strat

I think what bro sandman is saying is that we can DIY our own liquid additive without the need to those off the-shelf additive.

From my understanding,
By following Bro sandman's instructions,we can can get individual additive:
part A - liquid calcium additive (using calcium chloride in to mix with 1L of FRESH water)
part B- liquid Alkalinity additive (usinng sodium bicarbonate to mix with ANOTHER 1L of FRESH water)

Both additive are not to be mixed together.
Correct me if I am wrong.