Been using Seattle Aquarium water for years. I first treat it with kalk to precipitate any phosphates. Then I put an airstone in the tub to drop the pH back down.
If I am doing a large waterchange, I add some Instant Ocean to bring the salinity up. If only a small (10%) water change, I generally add back more water than I siphoned to end up with a correct salinity.
No photos for now - I was working out of town for a year, with NO water changes. So now I am getting the tank back cleaned up. But while I was doing regular water changes, the tank was fine with the treated Seattle Aquarium water.
If I am doing a large waterchange, I add some Instant Ocean to bring the salinity up. If only a small (10%) water change, I generally add back more water than I siphoned to end up with a correct salinity.
No photos for now - I was working out of town for a year, with NO water changes. So now I am getting the tank back cleaned up. But while I was doing regular water changes, the tank was fine with the treated Seattle Aquarium water.