CHLORINE WELL/POOL SANITIZER PELLETS (2x) PENTAIR LP-3000 LANDOMATIC DRY CHLORINATOR (2) 4 lb container of CHLORINE WELL SANITIZER PELLETS For use with LAND-O-MATIC PENTAIR LP-3000 Dry pellet chlorinator or similar style chlorinators Also Works well for pools, ponds, etc. Pellets are APROX. 1/4" ROUND Balls; 73% calcium hypochlorite; 27% Other ingredients MAXIMUM USE FOR POTABLE WATER IS 14 mg/L