Thread: zeovit rocks - how often do you replace?
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Old 05-16-2008, 04:06 PM
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Tom R Tom R is offline
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I replace mine every 10 to 12 weeks.

It is my understanding that their usefulness deminishes as they become saturated with the Phosphate and Nitrates that they absorb. For alot more information go to:

http://www.zeovit.com/

Tom R
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