We just had a new well installed and are considering getting a water softener now. The well driller said we have low iron content and a hardness of 21. We are getting some brown or cloudy water first thing in the morning but the well driller said
that should go away in about 3 months.

We never had a softener with our old point well and this well is only about 10' to 15' deeper and about 15' away from where are original well was. Water seems to taste the same and the only reason I am considering a softener is because of lime
build up on faucets and shower glass which we also had with old well.

What do I need to look for in a softener and what is the most economical and efficient? Would a water test tell use what we need?

We have 2 to 4 people in the house.
Low Iron and mineral content
hardness of 21