as the filters are listed below

9% rejection rate membranes and nuclear grade di resins built for hard water conditions so they last longer and provide higher quality h2o

Your meter will be perfectly fine and the small extra bottle is included for this purpose

Very apparent color change as the resin exhausts from a blue to a light gold/amber color

This is a use-then-dispose-of in-line-softener

Softening Filter In-Line FilterPacks as the filters are listedInline Water Softening Filter Introducing Air, Water & Ices in line water softening filter! If you dont already have a water softener in your house, and youre looking to invest in a water softener, then this is the filter for you. Consider adding this softening filter as a pre filter in front of your RO unit. Not quite the right filter for your system? Please check out all our filters here. How the Inline Water Softening Filter Works: The filter works