You could possibly have water mold, which looks like stings of toilet paper in the water. Dead algae can make a pool look cloudy. If you have a cya of 95 to 100 your chlorined levels are not high enough to have your water sanitized. Here is "Ben's best guess chart":


Stabilizer . . . . . . Min. FC . . . . Max FC . . . 'Shock' FC
=> 0 ppm . . . . . . . 1 ppm . . . . . 3 ppm . . . . 10 ppm
=> 10 - 20 ppm . . . . 2 ppm . . . . . 5 ppm . . . . 12 ppm
=> 30 - 50 ppm . . . . 3 ppm . . . . . 6 ppm . . . . 15 ppm
=> 60 - 90 ppm . . . . 5 ppm . . . . . 10 ppm . . .. 20 ppm
=> 100 - 200 ppm . . . 8 ppm . . . . . 15 ppm . . .. 25 ppm

You can see that you have to have a minimum of 8, and a shock level between 20 & 25.

Algae doesn't always look green or yellow. Your pool could just look cloudy. It will turn green when the bloom is in it's complete glory! Hope this helps, sometimes to see the chart shows how your chlorine demand goes up with cya.