Types of contamination:

  • Dissolved minerals can be pulled out of the water and stick to the sleeve.
  • Lime from new concrete tank clings onto the quartz as a white crystal - easily wiped off.
  • Iron shows up as  rust coloured staining - needs to be carefully scoured off.
  • Hardness (calcium and magnezium) sticks to the quartz and needs to be carefully scoured off.
  • Mud collects in the bottom of the chamber - this needs to be flushed out.
  • Mineral crystals can force past the seals and corrode the chamber nuts.

The contents of the chamber are often a better guide to water quality than the filters. Dirty plugged filters from city water look much the same as if they were tank or stream supplied.