Just a side note--before buying trichlor tabs from Sam's, check the ingredient label and make sure that it does not list any form of copper in the ingredients. The trichlor tabs at WalMart DO contain copper, so it wouldn't surprise me to find it in Sam's tabs, either. If you find copper listed as an ingredient, look elsewhere for your tabs--not because the chlorine is any different, but because you don't want to introduce copper into your pool. That's what causes green staining of liners, hair, and fingernails!
Janet
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