Unless it is one of the few salt mixes with organics in it like reef crystals, salt mixes can sit unstirred just fine. In that case, it may need aeration to prevent reduced O2 from bacterial consumption of vitamins.
Mixing does not reduce precipitation. If anything, the heat of mixing can accelerate it.
Randy, If I am reading this correct IO reef crystals need to mixed in the AWC container. are we talking a few days a day or 24/7.
I will be setting of a AWC system on the new tank after the move. and I use reef crystals. just want to make sure I do it right