Head Office: 67 Anderson Street, Manunda | (07) 4051 9344

Edmonton: 151 Bruce Highway, Edmonton | (07) 4055 4999

Treat Blackspot Algae

September 26, 2017


PROCEDURE TO TREAT BLACKSPOT ALGAE

BLACKSPOT ALGAE SHOWS UP AS BLACK OR DARK GREEN SPOTS ON THE FLOOR AND WALLS OF THE POOL AND HAS A WAXY COATING THAT REQUIRES SPECIFIC TREATMENT

Treat Blackspot using either TROPICAL/TROPICLEAR POOL ALGAECIDE or ALGAE KNOCK OUT

  • TROPICAL/TROPICLEAR POOL ALGAECIDE contains copper and benzalkonium chloride
    • NOT to be used in pools with IONISERS or NATURE 2
    • DO NOT superchlorinate in the 48 hours either before or after adding the product
      • THIS IS PRIMARILY FOR SHOP CUSTOMERS AS IT IS DIFFICULT TO OBSERVE FOR SERVICE WORK.
      • FOR SERVICE WORK as recommended by you
    • ALGAE KNOCK OUT is METAL FREE and contains a very high grade of benzalkonium chloride
      • MAY be used in pools with IONISERS or NATURES 2
      • IDEAL for pebble pools
      • Works best at a pH of around 6.8
      • Always advise the customer that the product will FOAM for a short while and have a bit of an AROMA/SMELL

DOSAGE RATE OF BOTH OF THE ABOVE ALGAECIDES IS IMPORTANT

  • Add 500mls for every 10,000 litres of pool water.
    • Never use calcium based chlorine in conjunction with copper based chemicals.
    • Run filter as normal to ensure adequate filtration
    • Recommend removing the cleaner from the pool prior to adding chemicals.
    • Recommend ceasing swimming during the period of treatment until the pool water is chemically re-balanced.
    • Check and adjust pool returns, to optimise water circulation
    • Come back to check the success of the treatment and chemically re-balance water.

MILD BLACKSPOT INFESTATION

(Based on a 50,000 litre pool)

  1. Establish a high chlorine level (2kg stabilised AND 20 litres liquid chlorine)
  2. Lower pH to between 6.8 and 7.00 by adding appropriate amount of hydrochloric acid
  3. Brush with hard bristled brush lightly to agitate algae. Keep brushing as treatment progresses
  4. Add 2.5 litres of TROPICAL/TROPICLEAR POOL ALGAECIDE or 2.5 litres of ALGAE KNOCK OUT
  5. Maintain a high chlorine level until the blackspot has been successfully treated then re-balance pool water

SEVERE BLACKSPOT INFESTATION

(Based on a 50,000 litre pool)

  1. Establish a high chlorine level using 1kg BLACK SPOT 900 (pebblecrete, white plaster, tiled pools) AND 20 litres liquid chlorine
  2. Lower pH to between 6.8 and 7.00 by adding appropriate amount of hydrochloric acid
  3. Brush with hard bristled brush lightly to agitate algae. Keep brushing as treatment progresses
  4. Add 2.5 litres of TROPICAL/TROPICLEAR POOL ALGAECIDE and 2.5 litres of ALGAE KNOCK OUT OR 5 litres of ALGAE KNOCK OUT
  5. Maintain a high chlorine level until the blackspot has been successfully treated then re-balance pool water

If Blackspot is still present following this procedure contact Allan’s Pool Shop for advice.