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 Leakmaster may be applied in locations where conventional solid sealants cannot be used It is compatible with most pool maintenance products and will not damage your pool equipment elemental mineral ingredients to create pool water that is noticeably cleaner