Salt has it uses in FW aquaria...
But everday use isn't one of'em!
A strong salt bath/dip for helping to remove external parasites prior to introduction to quarantine.
Salt in a quarantine tank to to kill ICH and other salt suseptible parasites, dosage at average 1tbspn per 5gal/2-3ppt.
Salt for treating NO2(nitrite) toxicity.
Salt for encouraging slimecoat production, helps protect/heal minor injuries, dosage at average 1tbspn per 10gal.
Salt, there are more uses......................
Whats the commonality?
Salt is a non-medicinal remedy, not a everday FW additive.
All the misguided so-called facts of the benefits of salt in everyday aquaria is just that, misguided.
The Pufferfish Forum article was very good IMHO, so is the salt info available at
www.skepticalaquarist.com.