actually, after i posted i remembered that my water was down a couple inches when my salinity was that high. i put in 3 gallons of water slowly over the course of the day and got it down (and topped off the tank at the same time)
when i got the tank, i got a glass cover that partially covers the tank. would the water temp go up too much if i used it to prevent evaporation? i haven't put it on yet, but was wondering.