Aerating is not the only way to raise your pH, but it IS the only practical way to raise your pH without increasing your alkalinity, especially when you have a TA of 180.

By the way, how are you testing? It's very, very unusual for anyone who's not a user of this site, or one of the other BBB sites, to be able test accurately at those levels (TA=150; TH=500) and it's even rarer to be able to test CYA=150. If your test results are NOT accurate . . . then all bets are off.