Nature2 Aboveground A Pro A Plus A30 Replacement Cartridge Single reagent size_1 oz Please ensure you spend sufficient Please ensure you spend sufficient time in becoming familiar with the operation of your Pool Patrol Alarms and to properly test the unit ensuring that it adequately covers all areas of the pool for the person(s) or pet(s) you wish to protect This is a Polaris Zodiac K14 Sand and Silt Debris Bag for Polaris 280 Pool Cleaners It is compatible with most pool maintenance products and will not damage your pool equipment Nature2's patented technology uses minerals to kill bacteria and control algae for up to six months