After initial opening and cleaning, my water was cloudy/clear for a while and I kept vacuuming every few days because I had brown spots all over the bottom. After clarifier and more vacumming the water is now crystal clear but I still get the brown globs all over the bottom the day after. I am now wondering if my Hayward sand filter is broken. Pressure is normal, around 17, and it never seems to need backwashing. Do you think silt and fine particles are just going straight through? I only run it 12 hrs a day and the dirt shows up after it has been running for a few hours. I have lived here 3 years and never had this problem before. Advice?