Changes

Slow sand filter

No change in size, 00:52, 17 July 2012

→‎Suitable conditions

- Long term benefits and low recurring costs <br>

| valign="top" | - Requires ascertaining the quality of the raw water and normally cannot be applied to water at low temperatures, with high turbidity levels and/or very low nutrient levels <br>

- Attitudinal An attitude change might be needed (belief system that water is not clean without chemicals)<br>

- Relatively high initial cost <br>

- Requires electricity/generator <br>

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