While the SW in the ATO sounds reasonable, I would also have the reservations Dakota is expressing. My worry would be "what did I NOT account for". But that is just me. Having said that, the sudden drop in SG most likely stressed the fish IMO. Bringing it up too fast or too far is going to stess them further. Since the OP will only be gone for two days, bringing it up a bit today and then waiting until Monday to bring it up more should have no ill affects IMO. But then again, I am pretty new at all this so take it with a gallon of saltwater. Pun intended.