I Shocked my Pool, so why is it still Cloudy?
Answer: If your PH is not too high (below 7.8) and you are holding a high level of Free Chlorine (10+), then the likely cause of your problem is Filtration. The Solution is to backwash (Rinse Filters) more regularly and/or change old sand, run Pump 24/7 and maintain free Chlorine at a high level until water clears.
Are Phosphates a Problem for my Pool?
Answer: High Phosphate levels can cause Algae problems. Phosphates enter the pool by leaching out of organic material (leaves etc...) and from fertilizers sprayed near-by. Algae feeds on Phosphates, so much higher levels of Sanitation will be required. Removal of Phosphates is ideal.
How often and for how long should I Backwash my Pool?
Answer: Under normal circumstances you should backwash your pool once a week for approximately 2 minutes (depending on pool size). If clearing a green or cloudy pool, backwashing will need to be more regular, every 24 to 48 hours.