Green Water - Algae and Copper Staining
Green water is generally caused by one of two problems,
Algae which are slimy or Copper
staining which is manifest as water discolouration.
Algae
Whilst not harmful, these microscopic organisms are unsightly, and
when you see them in the water are millions!! Barren
sanitiser periods (holidays/winter) and rain falling from
vegetation (trees) contribute to algae infestation.
Treatment
- Adjust pH to 7.2 - 7.6 range (remember chlorine efficiency is
impaired in high pH levels above 7.6)
- Ensure cyanuric acid/stabiliser levels are 100 or below, for
improved chlorine effectiveness
- Turn the circulation system on, prior to shock treating the
pool with Shock Granules or Sodium Hypochlorite to min. 5ppm
- Apply algaecide -
Super Algaecide/Liquid Algaecide whilst circulation is still
running for good distribution.
- Observe impact and if algae persist due to heavy contamination
repeat above.
- Remove dead algae (white residues) using clarifiers - where
contamination was dramatic full floc treatment with granular floc
or alternatively use Super/Ultimate Water Clarifier whilst the
system is running for filter entrapment of dead Algae. (Remember to
frequently backwash the filter to remove the build up of dead algae
on the filter)
Cure
Consider routine use of algaecides as outlined in Summer Ideals to
prevent algae blooms and costly remedial procedures as above
- Super Algaecide is a favourite, but if you cannot attend to the
pool often, then use Long life Algaecide
Copper Staining
Consider the source of the copper before remedy - it could be from
the equipment (e.g. heat exchanger) or from copper based
algaecides. If it is the former then it is usually caused by
acidic conditions prevailing as aggressive water, and regular pH
checks and periodic water balance is recommended.
Treatment
- Copper is stable in waters with middle pH bands, so adjust the
pH to the ideal range 7.2 - 7.6.
- Stain & Scaled Inhibitor or Multi Stain Remover to
gradually remove any recent staining from pool walls or
surrounds.
- Assist filtration removal by using Sparkle Tablets in the
skimmer, and enhance backwashing procedures in the first month
after treatment.