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HTH 1 Qt. Pool Care Algae Guard Ultra
HTH 1 Qt. Pool Care Algae Guard Ultra
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HTH Ultimate Algae Guard is the strongest algaecide formula available from the brand pool owners have trusted for over 25-years. Ultimate Algae Guard both kills and prevents even the most stubborn green, black and mustard algae. This non-foaming algae guard treats pool water for up to 90-days after applying to your pool â?and you can swim just 15-minutes after use.