Isopure Water · Media & Resin

Water Filter Media & Ion-Exchange Resin

The media inside a tank is what actually treats the water. This is our full library — activated carbon, softening and DI resin, calcite and neutralizing media, support gravel, anthracite and specialty grades — from Watts, Purolite, Clack, Hydronix and more, in refill and cubic-foot quantities for whole-house tanks and refillable cartridges.

How to choose media

Start with the problem. Carbon for taste/chlorine, cation resin for hardness, calcite for low pH, iron media for staining — match media to the water test.
Don't skip the gravel. A support-gravel underbed keeps media off the distributor and improves backwash — sized in layers by grain.
Match volume to the tank. Media is sold by cubic foot; a 9x48 tank holds ~1 CF, a 10x54 ~1.5 CF, plus underbedding.
Layered beds. Multi-media (anthracite/sand/garnet) beds filter finer than single media at higher flow.

Not sure what your tank needs? Send a water test and tank size and we'll spec the media.