Siliphos Balls, 1 kg
Stops scale and rust without softening. A gram or two per cubic metre.
Glassy polyphosphate spheres that dissolve at 2 to 3 grams per cubic metre of water and lay a molecular film on the inside of pipes, geysers and appliances. Scale stops forming, existing scale loosens over months, and rust stops. Not a softener: the minerals stay, so the water still tastes right. One kilogram refills a 20 inch shell a quarter at a time.
Vessel, valve and media together: the complete kitsHow much and how long
A household on 0.1 to 0.2 cubic metres an hour uses about 1 kg every three to six months. Fill the shell to two-thirds and top it up when a third has gone. The balls get smaller and cloudier as they dissolve; that is them working.
Where it goes
In the 20 inch refillable shell in any Big Blue housing, after the sediment stage, or in a dedicated siliphos dosing pot on the geyser feed. Cold water only: above 60 °C the film breaks down, which is why it goes before the geyser, not after it.
Drinking it
Food-grade polyphosphate at under 5 mg/L, the same treatment municipalities use in their own mains. It does not soften and does not add sodium.
Before you buy.
Goes with it.
Whole shop
20 Inch Refillable Cartridge Shell
Fill it with siliphos and the scale stops. Refill it, do not replace it.
20 Inch Big Blue Housing with Bracket
One housing, bracket and spanner. The building block.
Free courierAquaGuard Whole-House Filter
Every tap, every shower, every appliance. On a stainless steel frame.