tstephens3956 wrote:I am replacing the sand in my filter since the water clarity is not very good right now. I am weighing the options of putting sand in the filter again versus zeolite or ground glass. I get really mixed messages on the zeolite and the locals recommend against it and some folks are very negative on it. There is less objective information on glass but it does appear to last longer while being more expensive. I have found one objective article on the topic published by the CWC claiming that water clarity is better with glass while requiring less material.Here is a link to that study: http://www.cwc.org/glass/gl981rpt.pdf. Does anyone have an opinion on which filter media is best?
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