Calcite pH Correction Media, 25 kg
For water that eats copper. Raises the pH by dissolving, slowly.
Crushed calcium carbonate, 25 kg. Acidic water, pH under 6.8, is common from boreholes and rain tanks, and it dissolves copper pipes and geyser elements and leaves blue-green stains. Calcite dissolves into it instead, lifting the pH toward neutral and adding a little hardness. The bed shrinks as it works; top it up every six to twelve months.
Vessel, valve and media together: the complete kitsWhere it fits
Its own vessel, after the sediment stage and before a softener or a UV, with an F56A1 or F67C1 valve on top. Water passes up through the bed, the calcite neutralises the acid, and the pH at the outlet settles between 7 and 7.5. It suits water from pH 6.0 up; below that, ask us about blending a stronger media.
How much to buy
| Vessel | Calcite | Bags |
|---|---|---|
| 45 L vessel | About 50 kg | 2 |
| 75 L vessel (ours) | About 75 kg | 3 |
| 100 L vessel | About 100 kg | 4 |
The bed needs at least 60 cm of depth for contact time, so do not under-fill to save a bag.
Backwash and top-up
Backwash every one to two weeks at 20 metres an hour to lift the fines. Check the level every six months through the valve opening; when it has dropped 15 cm, add a bag.
Before you buy.
Goes with it.
Whole shop
Riser and distributors included75 Litre FRP Vessel with Riser and Distributors
The tank a filter or softener is built in. With the parts everyone else sells separately.
Free courierRunxin F67C1 Automatic Filter Valve
Backwashes itself. Set the days, set the hour, forget it.
AFM Grade 1, Activated Filter Media, 25 kg
Glass that filters finer than sand and never needs replacing.