Either change salt or when you prepare new saltwater, use a little bit of muriatic acid and an airstone for twenty four hours to bring the alk down to a more reasonable level.
Do you have SPS in your tank or other corals? If not, you can switch to a cheaper salt like Reef Crystals because anemones don’t typically need elevated levels.
Maybe the salt has separated in the bucket?
Not much help now, but you could try rolling the bucket around then mixing up another small batch to see if that fixes it going forward.