I have an above ground 18 x 48 above ground pool. I tested it and the chroline was low so I added the proper amount of shock. Do I need to add anything else? How long does it take to clear up the green water after the shock is added? Do I need to change out the pool filter often while it is green? I normally change it out every two weeks but have changed it 3 times in the last 2 days trying to get rid of the green…


Sounds like you are doing the right things. It can take a couple days or more depending on what is causing the cloudy water. Check the pH level as well to make sure it is in the right range to keep things in solution. Also, definitely keeping the filter clean is important to getting any suspended particles out of the water and not retransmitting the algae back in.