it reduces gh from 14 to between 1-3
it reduces ph by about .5 from 8.5
it lowers the kh from 8 to about 6 depending when the resin cycled
0 ammonia
0 nitrate
0 nitrite
what i am concerned about is the chloride and sodium in the water, this filter system uses salt to reset the resin, i need to find some test results of this filter, tap water is a bit harsh
If it uses salt, then it's doing ion exchange, reducing the calcium and magnesium by replacing with sodium (two sodium ions for each calcium or magnesium). I think you'd be better off using the water without putting it through this thing.
So looking at the water report what should i use, ion exchange filtration
r/o with suppliments
or just the tap water with aqua safe. I want to pick one and go with it somebody told me before to choose i and go with it and it makes sence.
taken from www.skepticalaquarist.com/docs/water/chlorine.shtml
"Dechlorinating it is often the first concern with tapwater. Most commercial dechlorinators are based on plain sodium thiosulfate, Na2S2O3, a crystalline salt that generally comes pre-mixed with distilled water, usually in a 1% solution. At this strength, 10 drops (that's 0.5 cubic mm) will neutralize common municipal levels of chlorine in 10 gallons, turning the chlorine to harmless chloride ions and adding some molecules of sodium and sulfur to the water. Unreacted sodium thiosulfate that may be left over is pretty inert and harmless."
Chloride is needed for fish as an electrolyte like in humans so yes it is harmless within reasonable levels. The sodium thiosulfate does indeed reduce the chlorine ion into dissolved chloride.
reading through my water report again, this post above would explain why thwe sodium levels are high {215 mg/l}, and there is no mention on the report of chlorine or chloramine
When you look at your water tests you will see it contains both Sodium and Chloride, thats basically common salt, and a small amount is harmless to most fish. In fact your Mollies are probably loving that high pH and a hint of salt.
All the water tests mean is that you have rather hard and high pH water. You will probably have more success keeping fish that prefer those conditions.
If you want to breed discus you will probably need to mess about with R/O etc.
The water softener you linked to just swaps calcium carbonate for sodium chloride, as a trace of salt in tap water is less of a problem than excess hardness.
Personally I would leave the water alone, and move toward fish that are happy in those conditions. Much simpler.