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Re: Lowering KH
> What about Muriatic acid? It'll lower KH and I've not seen any
> harmful side-effect.
Muriatic acid is the commercial name for hydrochloric acid, HCl. HCl
is a strong acid that will dissociate completely in water producing H+
and Cl- ions. The H+ will combine with bicarbonate ions (HCO3-)
lowering the KH a bit and will add to the equilibrium values of H2CO3
(carbonic acid) and free CO2.
However, the Cl- ions will have the same effect on your plants as
adding salt (NaCl).
Not recommended.
George