Set of 3 internal replacement filters for well water sources:
 
TWO 0.01 micron filters (each good for 500 gallons) plus ONE Pre-Filter (good for 1,000 gallons)
 
These filters are for Alka Viva H2 water ionizers only - Delphi H2, Vesta H2, Athena H2 or Melody II
 
Standard Municipal/City Water filters available
Fluoride filters available
EOS Scale Guard In-line filter available
 
Citric Acid Cleaning Filters available for annual maintenance.
Clean BEFORE you replace filters.
Good idea to do this every year or at least every 2 years.