Check ammonia, nitrite, pH, and salinity tonight before bedtime, after all the water changes. Water should be good with maybe some pH adjustment. Just remember, make pH changes slowly. And the target for this will be 8.0, even though your display is higher than that. Ammonia is less toxic with lower pH. Once the process is over, you can raise pH once you start returning the water to normal salinity following hypo.
Use some fresh garlic in one feeding if you can. Not bottled garlic.