Max Water Anti-Scale Siliphos Crystals (1 LB), Slow-Dissolving Polyphosphate Beads, Anti-Scale Filter Media for Refillable Water Filters, Prevents Scale, Corrosion & Iron Stains
NOTE: Due to the nature of the material, Siliphos balls may crack into shards during shipping. Shards can still be used as normal, and may allow you to squeeze a bit more material into a filter housing.
Diameter of Single Ball: 3/4 (0.75) inch
Used to sequester water hardness
Used to form a protective coating on metal surfaces