My pool was opened on July 2, 2007. At that time, being totally ignorant to this pool business, I purchased various chemicals per the service department's recommendations--the rep. knew the Aquapure swcg would be activateed 1 month later as they were doing the activation, that happened this afternoon. The chemicals I now have are 22 lb. bucket of hypo chlor granules (non stabilized) and about 13 lbs of tri-chlor 3" tablets. The rep. who activated the swcg stated that I should not use the hypo chlor granules for shock because it would eventually damage the swcg cell. Is this true? Will I have any use for the tri-chlor tablets?