has anybody here ever use this:
[h=4]Smart Shield™
[/h]
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or will this cause problems is by product like copper introduced....???
[h=4]Smart Shield™

- Effective reduction of water loss and maintaining water temps
- Creates an ultra-thin, invisible layer on the water surface
- Family-friendly alternative to physical pool covers
- Long-lasting results from small doses
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or will this cause problems is by product like copper introduced....???