Algae can be a major problem in domestic and commercial swimming pools. Unfortunately algae likes to grow in the same conditions we as humans like to use the water in. A warm and well balanced pool is the perfect environment for algal growth which in ideal circumstances has been known to double in population every 3-8 hours. This type of growth is common after rainfall during the summer months.
Were not going to get into the technical side of things here, and to make it easier, we have narrowed down algae removal to a few simple guidelines based on our experience over the years.
- Remove any hoses, toys etc from the pool and stop bathers using the pool until algae is removed and the chlorine levels and balance are at ideal levels
- Backwash filters and remove and large debris from the skimmer and pump baskets to ensure the flow rate of the filter is at a maximum
- Test the pool to determine the required levels of dosage required, Total Leisure provide free pool testing in store
- Balance the pH of the pool, pH balance is vital in ensuring that all chemicals added are effective during the process
- Dose the pool with Chlorine and a reputable algaecide, in basic terms, algaecides are designed to destabilise the cell wall for the free chlorine to kill the nucleus
- Brush the walls and floor to ensure the chlorine and algaecide touches the maximum surface area of the algae
- Keep the pump and filter running until the pool is clear to filter out the dead algae and to keep an even spread of chlorine throughout the water
- Repeat steps 3-6 until the pool is clear and balanced and on the direction of your pool store based on your pool type and water test results
There are several different types of algae and as a result, different algaecides are available to counter their growth. Generally , chlorine levels may need to be over 10ppm to oxidise the water, however in some circumstances this may cause bleaching of internal fixtures within the pool depending on your pool surface and materials used. See your local pool shop or contact us for more information on this.
Pool Algae Types
Green Algae. This is the most common type of algae and the easiest to kill. Most species of this algae initially make water dull or cloudy before becoming visibly green but some species show up as localized green clumps while others give the water a cloudy green haze.
Black Algae. This algae is more chlorine resistant than green algae mostly because it creates a waxy surface layer that protects the algae that grows deeper into pool surfaces, most notably plaster. This algae grows relatively slowly and its presence indicates extended periods of time with insufficient chlorine levels.
Yellow/Mustard Algae. This algae is about twice as chlorine resistant as green algae. It does not like direct sunlight so is usually growing on the shady side of the pool. It looks like dirt or powder but when brushed it produces a yellowish cloud. It is often confused with pollen, but pollen will settle based on circulation patterns including areas of direct sunlight.
Pink Slime. This is actually a bacteria and is usually easily killed by chlorine and prevented at the same chlorine levels as used to prevent green algae.