We currently have a Water Right Sanitizer Plus Series water softener in our 2-3 bath house. Our water was tested recently and the ph level was 6.5, iron 3.5, and hardness 12. We've been told that we need a 1.5 cu ft acid neutralizer installed. I have several questions. Does it matter what brand (any recommendations - we'd like to keep costs down as much as possible)? Calcite vs. mixed bed? Is this something that we can install ourselves? Thanks for any help you can give!