Adding water

[Authentic]

I have a 30 gal nano, I went on vacation and my salinity was .23 ,I have 1 pseudo chromis and a cud and some sorties. I came back and my salinity is .25 with about an inch and a half of evaporation.to keep the salinity where it is should I just add sLt water and is 25 a good level to keep it at?

[billdogg]

I hope you mean 1.025? but yes to your question - 1.023 - 1.026 is fine. Because you are now at 1.025, adding fresh water that is at 1.025 will keep it there. As more evaporates, use only fresh (preferably ro/di) water to make up the difference. When you do your water changes you can adjust the salinity of the make up water to keep your level in the 1.025 range.
HTH

[Lynnmw1208]

yep never replace evaporation with saltwater. When water evaporates, the salt remains behind increasing the salinity. Definitely top off with RO/DI water and perhaps invest in an auto top off system this way you don't have to do it manually. I use the JBJ one.