The water usually becomes cloudy when the amount of pool chemicals in the water is imbalanced. This could be due to high alkalinity, high or low chlorine level. When the chemical balance is not right. Unwanted particles start accumulating in the water. Cloudy water can also be due to filter issues. I had this problem and then it got fixed after I called in inground pool builders(http://www.soldapools.com/areas-serviced/swimming-pool-builders-contractors-toronto/
) to look it up and fix the issue which they did. Cloudy water can come if the filter system is faulty or if you are not running your filter as per the required 8 to 10 hours daily. A filter constantly cleans the pool water. So if you do not use it properly the water would stagnant and thus make the water cloudy. Always check your pool after you shock it.
You can get rid of the cloudy water by using pool clarifier. Using it once every week is important. The pool clarifiers collect the tiny particles that are causing the pool water to become cloudy and binds them together to form larger particles so that the filter can easily pick them up. Since tiny particles are difficult to get collected by the filter the pool clarifier would clot them together so that the pool filter would find it easy to trap them. Vacuuming the pool is also another thing that you could do. When vacuuming make sure that the filter is set on the backwash option. If you are using a cartridge filter remember to remove the drain plug. You could vacuum all the cloudy water out of your pool. This is important because if you pass a lot of dirty water through the filter it may not function properly. And the dirty water will flow back into the pool. By vacuuming out the dirt it would not go through the filter system. Vacuuming the pool would result in the loss of so much water so make sure that there is fresh water getting into your pool during the vacuuming process. Despite the loss of huge amount of water, if done properly your pool will clear up within a day.
There are a few errors in this post
1.Cloudy water is generally an indication of algae and you need to Slam
. Check this first
2.There is no need to run your filter 8 to 10 hours daily, it's a myth whatever mixes your chems and cleans is sufficient
3.When vacuuming the filter should not be set to backwash as it will send the water round the wrong way. Set to waste and it bypasses the filter
4.If you pass dirty water through the filter it makes it more efficient and doesn't just pass straight through. Backwash your filter when it's 20% to 25% higher than your clean filter pressure
5.Vacuuming through the filter which is desireable to clean your pool will not reult in any water loss, only backwashing and vacuuming to waste will lose water