Understanding Pool Algae and Why It Forms
As a pool owner in New Zealand, dealing with algae can be frustrating, especially when you want to avoid harsh chemicals. Algae thrives in warm, nutrient-rich pool water, particularly when circulation or filtration is poor. If left untreated, it can quickly turn your pool green, cloudy, or even slimy.
Thankfully, there are several effective ways to remove and prevent algae growth without using conventional chlorine or algaecides.
Natural Methods to Get Rid of Algae
1. Use a Pool Brush and Vacuum Regularly
One of the best ways to keep algae at bay is by manually brushing and vacuuming your pool. Algae can cling to pool walls, steps, and the floor, making it difficult to remove.
- Use a stiff-bristled brush to scrub all surfaces.
- Vacuum the loosened algae out of the pool to prevent it from circulating.
- Repeat this process daily until the algae is gone.
2. Improve Filtration and Circulation
A well-functioning filtration system is key to keeping your pool algae-free. Ensure your pool pump runs for at least 8 hours a day, especially during the summer months.
- Clean your pool filter regularly to prevent clogging.
- Run your filtration system consistently to keep water moving, as stagnant water encourages algae growth.
3. Solar Pool Covers – A Double-Edged Sword
While solar pool covers help retain heat and reduce evaporation, they can also trap heat and create the perfect environment for algae growth if used incorrectly.
- Instead of covering your pool all the time, allow sunlight to naturally disinfect the water.
- If you use a cover, remove it regularly to aerate the water.
4. Increase Aeration With a Fountain or Water Feature
Adding movement to your pool water by installing a fountain or waterfall helps improve circulation and oxygen levels. Algae prefers stagnant water, so increasing aeration can make the environment less favourable for growth.
You can find a range of pool water features at Pools & Spas Warehouse NZ.
5. Use a Pool Skimmer and Leaf Catcher
Algae thrives on organic matter like leaves and debris that accumulate in your pool. Regularly skimming the pool surface and emptying the skimmer basket can reduce algae’s food source.
- New Zealand retailers like Swimart NZ sell skimmers and pool nets that make this task easier.
6. Use Baking Soda or Salt as a Natural Alternative
While baking soda doesn’t kill algae, it can help loosen algae from pool surfaces, making it easier to scrub away.
For saltwater pools, ensuring optimal salt levels (as per your chlorinator’s recommendations) can help naturally combat algae. NZ Pool Products has a range of saltwater chlorinators suited for New Zealand conditions.
7. Consider a UV or Ozone System
Ultraviolet (UV) and ozone pool sanitisation systems are becoming popular in New Zealand as chemical-free alternatives to chlorine and algaecides. These systems help kill bacteria and algae spores before they can take hold.
Check with local suppliers such as Waterco NZ for UV and ozone systems.
Preventing Algae From Coming Back
Once you’ve removed the algae, taking preventative steps is key to maintaining a clear pool:
- Keep your pH levels balanced (ideally between 7.2 and 7.6).
- Avoid overfeeding the pool with nutrients such as phosphates, which algae thrive on. BioGuard NZ offers phosphate removers designed for New Zealand pools.
- Run your pool pump for an adequate number of hours per day.
- Regularly test and maintain your water quality.
Final Thoughts
While chemicals like chlorine are commonly used for algae control, going chemical-free is possible with regular maintenance and a combination of natural methods. By keeping your pool clean, improving circulation, and using alternative sanitisation options, you can enjoy a crystal-clear pool without relying on harsh treatments.
If you’re looking for pool equipment, maintenance tools, or alternative sanitisation options, local suppliers such as Pools & Spas Warehouse NZ, Swimart NZ, and Waterco NZ offer a range of solutions suited to New Zealand conditions.
Happy swimming! 🚿🏊♂️
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