Calcium Hardness Increaser - 50 Lb. Bag filter-internal-diameter_4 1/16 inches They have a modern foam

They have a modern foam core

This union is constructed of Schedule 40 PVC

5 inch vacuum head or spot cleaning when the vacuum head is detached

This ceramic pool depth marker is printed with 2 FT and has a skid resistant surface

The Aquabot Magnum pool cleaner with PVA brushes is designed for pools up to 80 feet in length and features the AquaSmart System

Calcium Hardness Increaser - 50 Lb. Bag filter-internal-diameter_4 1/16 inches They have a modern foamThis is a 50 pound bag of calcium hardness increaser which will raise the total the calcium hardness in your swimming pool water. This calcium chloride product is in granular form. For most pools, calcium hardness levels should be maintained between 200 and 400 ppm. Active Ingredient of the Harness Increaser: 100% Calcium Chloride. Directions for Adding Harness Increaser to Your Swimming Pool: If calcium levels are low, add this product directly to