Muriatic acid, or any mineral acid will lower ALK.
The calculation is:
DKH drop x water volume x .123 = ML of acid to add.
For instance in 40G of water, I need to drop it to 7 from 9:
2 x 40x .123 = 9.84ML of acid, I would just add 10 and call it good( I like round numbers).
I do this for every batch of IO I mix up. It mixes so consistently I add 15ml of acid to my mixing barrel, then test it a few days later, and it's always pretty close to 7.5.
The calculation is:
DKH drop x water volume x .123 = ML of acid to add.
For instance in 40G of water, I need to drop it to 7 from 9:
2 x 40x .123 = 9.84ML of acid, I would just add 10 and call it good( I like round numbers).
I do this for every batch of IO I mix up. It mixes so consistently I add 15ml of acid to my mixing barrel, then test it a few days later, and it's always pretty close to 7.5.
