Blackspot

Blackspot

Black or dark green 'spots' on the floor and walls of the pool and has a waxy coating that requires specific treatment.

• Treatment will not be instant - Tropical Algaecide works over a period of 10-14 days.
• Do not use copper-based algaecides if the pool has an excess build up of calcium
• The longer the Blackspot has been in the pool, the harder it is to treat.
• Success is also determined on how much Blackspot is in the pool. The amount of Blackspot is directly related to how Tropical Algaecide is required.
• No brushing is required.

Treatment:

1. Sprinkle granular pool chlorine over the patches. It will take 2 Kg or more.
2. Leave pump off 24 hours
3. Turn on pump
4. Add 2 litres of Hydrochloric acid
5. Lightly brush chlorine residues with pool broom
6. Add a dose of tropical pool algaecide
7. Swimming is allowed 2 hours after dosage

After 3 weeks, if black spot is still present, add a second dose of tropical pool algaecide (if the black spot has been present for more than 3 months, a second dose will definitely be necessary).

Take a water sample to Rode Pool Services for re-balancing.