It will be for mixing salt for water changes.
I had mixed up a batch on friday and checked the levels. Everything is was normal except Ammonia, which was at 1.00. However when I checked it yesterday Ammonia went down to .50.
So I can't store the salt water for like a week? I am trying to get my Nitrates down in my DT, and I was told that I would need to do a big water change. So I am trying to prepare for that.