so i’m new to saltwater, and a few days ago i went to the fish store and got my water tested. They said my salinity was too high, so i did a water change and brought it back down. My reading was around 1.028. Went to the fish store and got my water tested again, but they said it was 1.018. I dont have fish yet, im going too, but this is the only thing holding me back. I’m very confused.