Filter changes are recommended every 1000 gallons or one year whichever comes first.
Filter Set FS500 includes #1 and #2 filters to be changed annually and two pH/Alkaline/ORP cartridges that should be changed every six months. Please note that the black tank never needs filters or servicing.
Check your email for a Filter Change Reminder sent 11 months after your system purchase or last filter purchase. It includes a $20 filter discount!
Note: The price was recently increased by $15 to accommodate free shipping (shipping was additional previously).