Has anyone ever recycled the salt when doing a water change? I've been thinking on how much does salt cost every time we do a water change, so I've been thinking there must be a way recycled assault I mean the water is the only thing that evaporates so if we could find a way to get the unwanted materials out of the changed water we will be left with just the salt. I wonder if running a protein skimmer we go out of bubble aeration would do the job? I would like to hear some suggestions from all of you.