Re: water question

[IDMiamiBob@aol.com]

<<   The water is now soft but it is still high in disolved solids so far as
I know.  Could someone explain the exchange process used in water softening
systems and tell me if this water will work for Apistos and other South
Americans or do I need to go to RO
 water? >>

Ion exchange resins have a sodium-containing salt that readily gives off the
sodium and binds calcium, magnesium, and other heavier metals, in an
"exchange" process.  While the water tests soft for GH and KH, and acts
"soft" in the presence of sudzy things like soap, it may not be suitable for
some soft water fish.  Most of them will do quite well in it, but some are
sensitive to saltiness, and may not like this water much.  Years ago, I heard
of a DI unit that had a second stage, which electrically removed the sodium
compounds, giving a water quality as good as or better than RO, but I am not
sure they are still available.

Bob Dixon