Thank you for your help. Since I found you in the winter, I have been stocking up with chemicals. I do not have a cover as it died in the fall and that is how I found your site.

I have dichlor, lots of bleach, 20 gallons of liquid chlorine, borax and baking soda.

My sand filter is a large sand filter by Hayward and a 2 1/2 HP motor by Jandy. The filter is new.