What exactly is a "water softener"? A Reverse Osmosis unit? What kind of South Americans are we talking, and what are your current parameters?
Water softening is the act of reducing the dissolved
calcium,
magnesium, and to some degree
manganese and
ferrous iron ion concentration in
hard water. A common water softener is
sodium carbonate (
Na2
CO3).
These "hardness ions" cause three major kinds of undesired effects. Most visibly, metal ions react with
soaps and calcium-sensitive
detergents, hindering their ability to lather and forming a
precipitatethe familiar "bathtub ring". Presence of "hardness ions" also inhibits the cleaning effect of detergent formulations.
Second, calcium and magnesium carbonates tend to precipitate out as hard deposits to the surfaces of pipes and heat exchanger surfaces. This is principally caused by thermal decomposition of bi-carbonate ions but also happens to some extent even in the absence of such ions. The resulting build-up of scale can restrict water flow in pipes. In boilers, the deposits act as an insulation that impairs the flow of heat into water, reducing the heating efficiency and allowing the metal boiler components to overheat. In a pressurized system, this can lead to failure of the boiler.
[1] The damage caused by calcium carbonate deposits varies depending on the crystalline form, for example,
calcite or
aragonite.
[2]
Third, the presence of
ions in an
electrolyte, in this case, hard water, can also lead to
galvanic corrosion, in which one metal will preferentially
corrode when in contact with another type of metal, when both are in contact with an electrolyte. However the sodium (or potassium) ions released during conventional water softening are much more electrolytically active than the calcium or magnesium ions that they replace and galvanic corrosion would be expected to be substantially increased by water softening and not decreased[
citation needed]. Similarly if any lead plumbing is in use, softened water is likely to be substantially more plumbo-solvent than hard water[
c
I'm dealing with FH, Midas, JD, common Plecos, Texas cichlids. My water is at 7.2, which is as good as i can get with tap water here...
Because he wants to try and provide ideal water conditions for the fish he keeps, whether it be to simply promote health and well-being, or breeding.