Hi, had a new 8800 gallon fiberglass pool installed in July 2012. The installer provided several start up and maintenance chemicals. On of the chemicals is a granular product called E-Z Pool. It is supposed to be added on a weekly basis. It does not contain chlorine, I have an in-line chlorinator. The product says it helps clarify the pool.... am I wasting my money??? It is expensive, and I did use it for the 3 months that my pool was open last year without any issues. Just wondering. Thanks, I am learning a ton from this site!!!