Activator - Water Clarifier and Algae Control - 20 Lbs. sign-type_Aluminum It measures 8-3/8 inches in

It measures 8-3/8 inches in diameter

This American Products part is manufactured by a Poolweb partner to meet or exceed original manufacturer specifications

a blind flange is solid and has no opening

It is best on large debris and course sand and grit

Activator - Water Clarifier and Algae Control - 20 Lbs. sign-type_Aluminum It measures 8-3/8 inches inThis is a 20 pound tub of Haviland Activator that is formulated to enhance your water quality by helping control algae and clarify the water. Activator is a dry granular that conditions the pool water. Water is noticeably more comfortable for swimmers. Active Ingredients of this Activator: 99. 5% Tetraborate Pentahydrate. Directions for Adding Activator to your Pool: With pump running, broadcast Activator over the surface area of the pool. Apply 2