I want to purchase a unit to use for my salt mix and water changes. I'm going back and forth to the LFS once a week getting premix and RO.

I think I will produce 40 gallons on a monthly basis. That will allow for a water change biweekly for both my freshwater and saltwater, and is enough for saltwater premix biweekly water change.

Any recommendation on which unit to get? Extra accessories recommended/needed (bucket, TDS)?

Thanks
KT