Instant Cartridge Cleaner$14.95 1 Quart Spray on cleaner for hot tub/spa filter cartidges. Simply spray the solutuion onto your filter cartridge, wait 3-5 minutes and then rinse with water. Instant Cartridge Cleaner quantity Add to cart SKU: 120-018013S12 Categories: Equipment Maintenance, Spa Chemicals Related products Add to cart Liquid Calcium Balancer $10.95 Add to cart Jet Line Cleaner $12.95 Add to cart Bromine Bank $20.95 Add to cart Naturally Clear $12.95