I tried the search and didn't see this as a post so I figured it couldn't hurt to ask. I have an 8 gallon nano in its early stages. I'm replacing evaporation with rodi fresh and once a week changing one gallon out for new rodi salt mix. In the last week my ph has dropped from 8.3 to 8.0. I assume that the rodi fresh is 7.0 ph so maybe that's bringing it down. I'm really not sure. Any suggestions for methods to stabilize a healthy ph are very welcome! Thanks!!