Exactly sodium chloride does nothing for fishAn article if anyone would like to read it.
As it is rather long I will note that the salt we use in aquariums to treat infections or nitrite poisoning is just sodium chloride, not marine salts or mineral salts. Also that hardness minerals (mainly calcium chloride and magnesium chloride) are utilised during osmoregulation.
Salt has been scientifically proven to have a number of benefits. Matt Clarke scours the journals and speaks to industry experts for the latest on the subject.www.practicalfishkeeping.co.uk