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My phosphates are either 0 or very close to it,the lab where I work tested it and it tested at .004ppm my kit is a cheap one by aquariumpharma. but gave me zero as well.I love my skimmer its an old fashioned counter current hang-on skimmer,the air to water area is 3 1/2"x 22" the flow is low to give good contact time,it takes out about 1 1/2 cup of green/brown liquid every 2 days.
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My wife thinks everything in this hobby costs $20. ;)
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