GREEN / BROWN ALGAE ON POOL WALLS AND SURFACES



“Moss like” algae growing on swimming pool walls and surfaces. Usually found on the shaded areas of the pool.

  • Low levels of chlorine/bromine
  • High stabilizer level (chlorine pool)
  • Poor water balance (high pH)
  • Poor or no circulation and filtration
  • High chlorine/bromine demand caused by:
  1. Dirty pool
  2. High bather load
  3. High temperatures (air and water)
  4. Heavy Rain
  5. Phosphates, Nitrates
     

Easy algae to eliminate


  1. Add fresh water to the swimming pool. Bring water above normal levels.
  2. For a chlorine pool test stabilizer (CYA) level. If CYA is less than 75 ppm proceed to next step. If CYA is greater than 75 ppm then follow “Dillution” formula to bring CYA below 75 ppm or add BROMINE PRE-TREAT at a rate of 400 gr per 10,000 litres of pool water (this will temporarily convert your chlorine pool to bromine so that the CYA will not interfere with the algae treatment).
  3. Adjust water balance and pH to 7.0.
  4. Brush all pool surfaces to remove algae.
  5. Put all pool tools (vacuum hose, vacuum head, vacuum pole, automatic pool cleaner, leaf skimmer etc.) into the pool prior to and during superchlorination.
  6. Superchlorinate to 30 ppm (follow chlorine chart for product choice, water volume and amount).
  7. Maintain pool filtration and circulation system.
  8. Monitor chlorine/bromine level. If the level “zeros” out we may have not met the demand. Repeat the Superchlorination procedure to 30 ppm.
  9. Wait at least 24 hours and then add MBA-60 at a rate of 70 mls. per 10,000 litres of pool water.
  10. Monitor sand filter pressure and backwash as needed as filter picks up dead algae.
  11. For a cartridge or D.E filter remove and clean with a chlorine solution.
  12. Several days later vacuum any dead algae to waste.

NOTE: Do not use service tools in a contaminated pool and then in a non-contaminated pool. You will transfer the algae from one pool to another!


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