pH Fix – Calcite

Description

Recommended Water Parameters for Using Calcite

1. pH Range: Ideal for use in water with a pH level between 6.0 and 6.8. If the pH is below 6.0, calcite may not be effective alone.
2. Hardness: The water should ideally have low to moderate hardness, as the introduction of calcium carbonate may increase water hardness slightly. Calcite is suitable for water with up to 50mg/l CaCo3 Total Harness, higher hardness levels could cause scaling.
3. Water Temperature: Recommended for cold water applications; calcite dissolves more slowly in cold water and can be more effective for gradual pH adjustment.
4. Flow Rate Considerations: Calcite requires a specific contact time with water to dissolve adequately and adjust pH levels. The flow rate should be adjusted based on the filter bed depth and water demand.

Recommended Filter Bed Depth vs. Flow Rate

The depth of the calcite filter bed affects both the efficiency of the pH correction and the system’s flow rate. A deeper bed allows for more contact time between the water and the calcite media, resulting in better pH correction.

• Flow Direction: Recommended Upflow Configuration.
• Minimum Bed Depth: 24-30 inches (61-76 cm) for effective pH adjustment.
• Flow Rate: Generally, calcite filters are designed to work with flow rates of 3-6 gallons per minute per square foot (GPM/ft²) of bed area. Higher flow rates may reduce the contact time and effectiveness of the media.

For a typical household system, with a flow rate of 30-50 liters per minute (LPM), ensuring the correct bed depth and area is crucial for efficient pH adjustment.

Recommended Parameters vs. Hardness, pH, and Flow Rate

• For Moderate pH (6.0 to 6.8): Pure Calcite is sufficient.
  • Flow Rate: 0.36m³ – 0.73m³ – 1054 FRP Vessel – 2 Bags
  • Flow Rate: 0.6m³ – 1.2m³ – 1354 FRP Vessel – 4 Bags
  • Flow Rate: 0.7m³ – 0.14m³ – 1465 FRP Vessel – 5 Bags
  • Flow Rate: 0.92m³ – 1.85m³ – 1665 VRP Vessel – 6 Bags
  • Flow Rate: 1.2m³ – 2.4m³ – 1865 VRP Vessel – 9 Bags
  • Flow Rate: 1.47m³ – 2.9m³ – 2472 FRP Vessel – 16 Bags
  • Flow Rate: 4.7m³ – 9.4m³ – 3672 FRP Vessel – 36 Bags
  • Flow Rate: 5.7m³ – 11.4m³ – 4072 FRP Vessel – 43 Bags
  • Flow Rate: 8.2m³ – 16.4m³ – 4872 FRP Vessel – 60 Bags
• For Higher Flow Rates: A deeper filter bed or multiple filter stages may be required to maintain pH correction efficiency.

* For Borehole, Well Water, River Water and/or Dam Water it is always advised to get the water tested trough as SANAS accredited water lab in accordance with SANS241 minimum recommendation for human consumption, before purchasing any water filtration equipment.

* The information and recommendations in this publication are based on data we believe to be reliable. They are offered in good faith, but do not imply any warranty or performance guarantee, as conditions and methods of use of the products are beyond our control. As such, Osmotech (Pty) Ltd makes no express or implied warranties of any kind with respect to this product, including but not limited to any implied warranty of merchantability or fitness for a particular purpose.

* The filter media listed on this product page do not remove or kill bacteria. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.