Frequently Asked Questions


Q: Why has my pool gone green?

A: This is usually a sign of algae. Reduced chlorine levels or insufficient circulation are the main causes of algal growth. The other reason a pool may change to green is too many trace elements in the water.

Q: How much chlorine should I use?

A: It is recommended to maintain your free chlorine levels at 1-3ppm. You must make sure that your water is balanced correctly too. A high pH will decrease the effectiveness of your chlorine drastically! Organic matter (leaves, bugs, birds, urine, people, etc.) all use the free chlorine in your pool. The dirtier the water is, the greater the chance of it going green!

Q: What is sufficient circulation?

A: Your pump must run long enough to extract the organic particulates from the water, and if you have a salt water chlorinator it needs to produce enough chlorine. You also need to keep the filter clean or the flow will be reduced, taking more time to pass the same amount of water and placing undue strain on parts of the system. It is recommended to run your pump for at least 8 hours every day during summer when you are using the pool and the temperature is hot. This can be decreased to 4-6 hours during winter when weather is cool and you are not using the pool much.

Q: Chlorine and circulation are good so why is it still green?

A: If you have too much copper (commonly used as an algaecide) this can change your pool water to a green/blue colour. This can also cause staining on your pool surface. If the water is clear but green it is probably a mineral imbalance. If it is patchy and you can see solid particles floating in the water then it will be algae.

Q: How do I fix an algae problem?

A: This requires a couple of stages. Firstly, remove as much solid material as you can. Scoop the scum off the top and vacuum the bottom of the pool straight to waste. Don't try to vacuum through the filter as it will clog very quickly and you don't remove any of the algae as it will still be growing in the filter!! Secondly a large dose of chlorine and some algaecide need to be added. Scrub the pool to get as much algae off the surfaces as possible and then let your pool run constantly for at least 24 hours. (Yes that's right folks. DON'T TURN YOUR PUMP OFF AT ALL!!!) If you wake up the next day to either a clear pool or a milky white one then congratulations! You won! The algae are dead. All you have to do then is vacuum the pool straight out your waste line. This may be helped by the use of a floc treatment, which makes the particles join together and drop to the pool floor making for much easier vacuuming.

Q: How do I fix a mineral problem?

A: If there is a severe mineral imbalance then the pool may need to be drained, surface stains cleaned, then refilled. For a mild imbalance sequestering agents can be used to keep the minerals in their free form and stop them making any further stains.

Q: What can I do to stop the green coming back?

A: Maintain correct chlorine levels, make sure your water is properly balanced, keep your filter clean, and run your pump long enough to do its job. By the time you see your pool go green there is already a major problem! Did you know that there can be as many as 30,000,000 algae spores in a 30ml shot glass of water. That adds up to many billions of spores before you even see the pool go green!!

Q: That sounds like a lot of hard work! Is there an easier way?

A: Yes! Call a professional. Desert Pool Care technicians will do everything needed to get your pool back to sparkling, and keep it that way. Contact us now!