Calcite
Calcite is a crushed and screened white marble media which can inexpensively be used to neutralize acidic or low pH waters to a neutral, less corrosive effluent.

As the Calcite’s calcium carbonate neutralizes the water, it will increase hardness and a softener may become necessary after the neutralizing filter.
| ADVANTAGES |
| Naturally occurring material |
| Low uniformity coefficient for maximum contact for controlled correction |
| Slower reacting for controlled correction |
| Inexpensive |
| PHYSICAL PROPERTIES |
| Color: Near white |
| Bulk Density: 90 lbs./cu.ft. |
| Mesh Size: 16 x 40 |
| Specific Gravity: 2.7 |
| Effective Size: 0.4 mm |
| Uniformity Coefficient: 1.5 |
| Hardness: 3.0 {Mohs scale) |
| Composition: CaCO3, 95% min. MgCO3, 3.0% max. |
| CONDITIONS FOR OPERATION |
| A gravel support bed is recommended |
| Water pH range: 5.0-7.0 |
| Bed depth: 24-30 in. |
| Freeboard: 50% of bed depth |
| Backwash rate: 8-12 gpm/sq.ft. |
| Backwash Bed Expansion: 35% of bed depth |
| Service flow rate: 3-6 gpm/sq.ft. but may be modified to adapt to local conditions |
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