There shouldn't be any contaminants. Most bodies of water nearby are pretty clean as well. Would filtered water from a refrigerator work if heated properly?Distilled water should work fine. Rain water could also be great as long as you are sure there are no contaminants in it.
Typically refrigerator filters are carbon or a combo of carbon/floss cartridge. So I doubt they'd filter out enough of the minerals you're trying to eliminate. The only thing you could do is pour some and test it. If you have a replacement filter handy or can look up the filter online you can see exactly what they filter out and what they don't.There shouldn't be any contaminants. Most bodies of water nearby are pretty clean as well. Would filtered water from a refrigerator work if heated properly?
I believe the specific filter I have does. I changed about 1/3 of the water in my 20 and 25-30 percent in my 60 and replaced it with the filtered water. I'll hopefully test it tomorrow.
I've looked into it. I only managed to find one. It was an old used one that wasn't in good shape. I'm having to come up with other options.You can buy a RO system for your house. I have friends in the Midwest that use them for fish that need soft water.