Steps to remove algae in swimming pools
1. Brush the walls and floor of the swimming pool to remove as much of the algae as possible.
This will greatly reduce the amount of time it takes to kill and clear the algae bloom.
2. Ensure that the pH level is within the range of 7.2 – 7.6. This will ensure that any chlorine
added will work more efficiently – high pH levels, in particular, will impair the efficiency of
the chlorine doing its job. With the pool filter system running, add a chlorine-based
swimming pool shock at the rate of 1.6 kg. per 1,00,000 liters of pool water dosage for
killing algae. The pool filter system should continue to run 24 hours a day.
3. If the condition of the swimming pool does not significantly improve after 12-24 hours of
filtering, add a second dose of chlorine pool shock at the increased rate. Repeat this process
until the algae have been eliminated.
4. Once the algae are dead it will turn a white or grayish color, and it will be suspended in the
pool water or settle to the floor. When there is no longer any sign of the color green in your
pool, thoroughly vacuum the swimming pool. It is recommended that you vacuum dead algae
to waste and not through the filter.
5. The pool filter should be backwashed or cleaned to be sure that dead algae are not trapped
inside the filter. If the filter is not thoroughly cleaned the algae may quickly return.
6. Test and balance all of the pool chemical levels using the following guidelines. Free
Chlorine: 1-3 ppm, pH: 7.2 – 7.6, Alkalinity: 80 – 120 ppm and Calcium Hardness: 200 –
7. Begin adding an algaecide pool chemical on a weekly basis to prevent algae from returning
Pay closer attention to the chlorine level of your swimming pool water in the future. Algae
and harmful bacteria are almost immediately destroyed by a free chlorine level of 1 ppm or
higher. You have experienced an algae problem because you have not properly maintained
the chlorine level, and it was allowed to drop below 1 ppm. Test pool water frequently and
make any necessary adjustments for a clean, safe and easy to maintain the swimming pool.
• Chlorine pool shock needs to be dissolved in a large bucket of water before it is added to the
swimming pool. Always add chemicals to the water when dissolving. NEVER add water to
• Monitor your pool filter system closely during this entire process and thoroughly backwash
or clean the filter each time the pressure rises 10 psi. above the normal operating pressure.
The dead algae that your pool filter collects may quickly dirty the filter and need to be
cleaned out frequently.
• Phosphate Levels – high levels of phosphates in pool water will result in your pool using
much more chlorine than usual. They are also one of the main food sources for algae,
therefore it is important to have these levels checked fairly regularly especially if the pool
seems to be using more chlorine than usual. A pool with a particularly bad case uses
approximately 2.5 times the amount of chlorine that it should have, making it very difficult
Contact Ace Dynamics to know more about the swimming pool filtration.