Hi Jeremy,

Cloudy water can be caused by lots of things...dead algae, calcium too high, "mystery chems" put in the pool during opening, etc etc etc. My first suggestion would be to measure your chlorine tonight after the sun is off the pool, then again in the morning before the sun hits it. If you've lost more than 1 ppm of chlorine in that time, then you're still fighting something in the water and need to get the chlorine back up to shock level, which for a CYA of 60 means chlorine of 20 ppm. (Make sure your pump is off during this time period so that your chlorinator isn't feeding chlorine into the pool and giving you a false reading.) Once you get back up to shock level, you need to test as many times a day as you can, and add more chlorine to maintain that 20 ppm until you're not losing more than the 1 ppm overnight. At that point you can let your chlorine drift back down to the normal range (5-10 ppm).

If you haven't lost more than 1 ppm overnight, then we need to look at your filter. Do you see sand blowing back into the pool? Do you see your filter pressure changing after a backwash? Are you putting the filter through a "rinse" cycle after backwashing before going back to filter mode? Is your pressure rising as the filter runs? If your pressure is rising, then your filter is catching some of the stuff and may just need some time, although I agree that 3 weeks is a little long. The other suggestion I have is to try the DE trick that the other 3 mods use--put a cupful of DE (the media that you use in a DE filter) into the skimmer with the pump running, then watch the returns. If the DE blows out, then you have a filter issue that needs to be addressed. If it doesn't, then the DE will stay in your filter and help the sand catch smaller particles than it would alone. The DE will backwash out with the dirt during the next backwashing, so will need to be replaced after backwashing if you like the result.