A green swimming pool is usually a sign that the water chemistry is out of balance — most commonly because there isn’t enough chlorine to control algae.
In the Helderberg, warm weather, sunlight, dust and debris can all contribute to algae growth. Even a pool that looks clean can quickly turn green if the chlorine level drops or the filtration system isn’t running effectively.
Common reasons your pool keeps turning green
- Low chlorine levels – Chlorine kills algae and helps keep your water sanitised.
- Poor water circulation – If the pump or filter isn’t working properly, algae can build up in areas where water isn’t circulating well.
- Incorrect pH levels – When the pH is too high or too low, chlorine becomes less effective.
- A dirty or ineffective filter – Your filter needs to remove the particles and contaminants that contribute to cloudy and green water.
- Leaves, dirt and other debris – Organic material in the pool can use up chlorine and encourage algae growth.
How can you stop your pool turning green?
Regular testing of your pool water, maintaining the correct chlorine and pH levels, cleaning the pool and filter, and ensuring your pump and filtration system are working properly can all help prevent recurring algae problems.
If your pool keeps turning green despite your best efforts, there may be an underlying filtration, circulation or water-balance problem.
Waterline Pools provides pool services in the Helderberg and can help identify why your pool is turning green and what needs to be done to get it looking clean and inviting again.