Sodium Bisulfate - pH Down - 50 Lb. Bag sign-subject_Lifeguard/No Lifeguard This is a Hayward SX310J

This is a Hayward SX310J Large Filter Support Stand for Pro Series S310T2

Each battery is designed to work seamlessly with its corresponding control box and charging system

It does not require expensive reagents and is compatible with Cyanuric Acid (CYA) at all concentrations

The Wide Mouth Inground Winter Skimmer Plug securely fits into your skimmer opening using an exclusive Rovaseal thermo insulated layer

This item replaces 99958902-DIY

Sodium Bisulfate - pH Down - 50 Lb. Bag sign-subject_Lifeguard/No Lifeguard This is a Hayward SX310JThis is a 50 pound bag of Sodium Bisulfate, also known as pH Down. This product lowers pH to an ideal level for swimming and recreation. Helps to prevent eye irritation, cloudy water, and scaling caused by high pH. It also helps chlorine fight bacteria and control algae which keeps your pool looking clear.