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.
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