Hello;
There is a train of thought --- " I may be the only one on the train though!" --- Use supplements to correct, and Kalkwasser to maintain!
If you use stuff bound to a chloride and stuff bound to a sodium you can only make salt. And, your skimmer and salt deposits will take care of the extra salt.
If you use stuff bound to hydroxide - OH -- you can even make water! Or, Carbonate, bi-Carbonate, Carbonic Acid, etc,.
If you use stuff bound to Sulfate --- "Well, there are a lot of undersea lava vents spewing the stuff." --- You may feed something that eats it --- or it may build up --- either way there is a lot of Chloride and Sulfate in normal sea water.
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"When we are told something long enough, we tend to believe it!"
"Some Athiest, Somewhere"
Enjoy!
OFM