Take a walk outside and look at and around your pool area to see if there are any major obstructions, trees, fences etc. shading your pool between the optimal 9am-5pm solar window.

 

Using the Pool Shading Chart below, determine the percentage of area and length of time any area of your pool is covered with shade during the Solar Window. If only a portion of the pool is shaded for part of the solar day, then a Shade percentage should be extrapolated from the table (i.e. 50% of the pool shaded for 50% (4 hours) of the solar day equals 25%). Indoor pools should use 100% shade.