Synergy Pool Care Kit (Various Sizes) (Large Kit) Large Kit includes 11 lbs of Synergy Tabs 10 lbs of Synergy Clear 1 pack of Synergy Test Strips Complete instructions for once a week maintenance. For first time Synergy users, order with Initiator. Large kit lasts a 10,000 gallon pool approximately 20 weeks and a 15,000 gallon pool approximately 15 weeks.