I forgot to mention that a couple years ago I experimented with RO versus tap water. I was using RO reconstituted to 25 ppm with Kent "R/O Right". My zebras didn't seem happy at all and didn't breed (I kept it up for months). I eventually doubled it and then tripled it and they started acting better ...

Hi, that's my website. I've been raising zebras without RO. I just use tap water but my tap water is fairly soft. It's 190 ppm. Not sure about pH, the meter is broke, but it's probably near neutral (at least it was at my old house 10 miles away). I filter the tap water before it gets to the fish ...