Synergy Initiator (Various Weights) (12.5 Lbs) Synergy Initiator is added once a year at the beginning of the swimming season (or with water replacement) to provide sparkling clear water that enhances swimmer comfort. Initiator is not susceptible to sunlight or UV rays, does not evaporate or become altered by other pool chemicals. Extends the life of pool equipment. Dosages: 5 lbs. per 4,000 gallons The Synergy system is compatible with Enjoy, Sustain, Simplicity, Snap and Relax. Simplicity and Snap systems are compatible with Synergy and may be used interchangeably. Simplicity and Snap may to shipped as a substitute when Synergy boxes are sold out