Don't sweat it too much. That is a bit high but not terrible. The important thing is, if things get out of whack like that, which sometimes they do, don't panic and starting freaking out. Not saying that you are. Just saying in general. Some people will see something pretty minor wrong and go haywire and start doing crazy things to their tank just making it worse. When you get something that is not right, figure out what is wrong and usually try to change the situation slowly. Stability is one of the most important things in a SW tank. If you had high salinity and you changed it too fast, the shock would be more harmful than the high salinity. So, what you did is good. You weren't sure what to do, seemed to stay calm and came here to ask for help, got great information, and you listened to it and learned something. I learn new stuff every time I come here.