OMNI 24304OM 12-1/2Lb Pail SYNERGY® Initiator® was made exclusively for use with the Synergy System. This innovative "Once a Year' treatment "turns on" the Synergy System to provide sparkling clear water and enhanced swimmer comfort. Synergy Initiator extends equipment life and is not susceptible to sunlight degradation, does not evaporate and is not altered by other pool chemicals. It normally requires application only once a year.