This is the filter set for Aquarium RO Systems. We recommend changing these filters every 6-12 months for the best quality of water.
The set includes:
(1) 1 Micron Sediment Filter
(1) .5 Micron Carbon Block
(1) DI Color Changing Resin cartridge
If you are needing to replace the membrane too, which should be changed every 3-4 years, click membrane to purchase.
If you have any questions or need other filters, just let us know, thanks.