If you have a green pool, you may be wondering how to clean and treat it to return it to its sparkling glory. But what causes your sparkling blue pool to turn green? Well, the primary cause is a chemical imbalance which lets algae thrive which is what makes the pool green. When your pool has low levels of chlorine, algae and other organics will grow but if you have enough chlorine in the water, algae will have a hard time growing. That’s why it is recommended that you shock your pool with super-chlorinated algaecide. But there are other chemicals apart from chlorine which affects your pool’s chemistry, so you can adjust their levels as well.
Here is a comprehensive step-by-step process you should follow when treating a green pool.
Step 1: Figure out how green your pool is
You need to figure how green your pool is or how severe your case is as it determines the treatment plan to implement; whether to chemically treat it or drain it. Because if it is a severe case and the pool is too green, it is less time-consuming and cost-effective to drain and acid-wash the pool instead of shocking it.
Step 2: Test the water
Since the pool is green, there’s obviously very little or no chlorine present in the water, so there’s no need to test for chlorine. However, make sure you test for pH because a high pH can impede the effectiveness of applying shock to the pool. It will make the pool become very cloudy. The pH should be 7.2 or lower. Test again for pH after shocking and make sure it is optimal.
Step 3: Shock the pool
Once you ascertain the pH to be 7.2 or lower, you can begin shocking the pool. Start with granular or liquid chlorine and broadcast the chlorine throughout the pool. Keep the filter pump on and make sure you distribute the chlorine evenly on the pool surface. After a few hours of circulation, add algaecide and floccing agent to clump the dead algae particles together.
Step 4: Pump, Filter and Brush
Backwash your filter first, and then run the pool pump for 24 hours. If you have a cartridge filter, ensure it is in great condition. After 24 hours, there should be a significant transformation in your pool. It should not be green anymore, but will still be cloudy. You will need to brush and filter for the next few days to clear green areas. Please note that it will take longer for the water to become clear as it takes time for the cloudiness to disappear.
Step 5: Maintain Your Pool Balance
You now have clear and sparkling water in your pool, if you want it to stay that way, you need to maintain the pool’s chemical balance. Make sure that your pool has enough free chlorine, and clean your filter regularly. You might also want to use a water clarification system if you want a clear sparkling pool. Regularly check pH and alkalinity levels and make sure they are balanced.