Paradise Spa Vac - Lightweight Vacuum for Hot Tubs and Spas Sirona Simply The only way to determine

The only way to determine when your blue mineral cartridge needs to be replaced is to keep track of when you installed the blue cartridge

as well as the Streamline Pool®:

Pleatco PTL47W-P filter

Freshwater™ pH / Alkalinity Down lowers the total alkalinity levels and the pH in your spa water to increase the effectiveness of your sanitizer as well as reduce the chance of equipment corrosion

The Tropic Seas 35 Sq Ft

Paradise Spa Vac - Lightweight Vacuum for Hot Tubs and Spas Sirona Simply The only way to determineThis item is only available in store and cannot be ordered online The Paradise Spa Vac is a self contained spa vacuum that uses a siphoning action to remove debris from the floor of your spa. No batteries or water hook up required. Use the Paradise Spa Vac to clean the hard to reach spots in your hot tub. The aluminum telescopic pole extends to over 7 feet. Perfect for the stones & grit that are tracked in from your feet into the bottom of the spa!