Recommended water filter cartridges setting for RO/DI water filter for aquarium use.
Stage One – Sediment Filter
Stage Two – Loose Carbon Filter
Stage Three – Carbon Block
Stage Four – RO Membrane
Last Stage – DI Resin
We recommend changing sediment filters when they become visually dirty or there is a noticeable drop in pressure. Change carbon blocks every 6-12 months depending on use and water quality condition of the household. This kit does not include a membrane filter as they need replacement every three years or so, depending on water and set up.