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Posted: **Sat Feb 27, 2010 8:29 pm**

Not sure how they really work but have heard they are very affective in keeping water crystal clear. Can i use one in my turtle tank and get results?

Posted: **Sun Feb 28, 2010 5:15 pm**

They're effective if you have algae/green water issues. They are also effective in neutralizing free floating microbes.

UV Sterilizer?