I see the emotional response was high to my assertions and I understand why obviously. Not everyone, even people in the hobby for years such as myself, have located and or have access to a true diehard trustworthy LFS with progressive filtration that is completely trustworthy. I don't deny that's a hard thing for all but the most skilled, adept hobbyists to locate and gauge.
In that respect you all are wrong but right statistically in your supreme wrongness.
-Most people, even most tenured hobbyists on internet forums, won't be able to ever locate a priceless diehard LFS with progressive filtration and a giant, tenured setup, this is true.
-Most people are not statistically capable of keeping their fish healthy period, so while entirely wrong in your wrongness there is truth, most people are incapable of finding a good LFS (not some POS with great air conditioning, a REAL LFS with weird fish people that looks like a place no one with a Polo shirt ever walked in from the road before you pull in).
Yes if we're going off those realities then yes, I agree, perhaps the POS water that your internet wholesaler sent you is indeed questionable and you should be cautious.
However if you have a great LFS then you already know that their water is fine. The argument that a great LFS's water (better quality water than any of you will *ever* achieve in your tank) is dangerous is simply inaccurate.