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Old 08/31/2015, 04:33 PM   #1677
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Join Date: Sep 2014
Location: Chicago
Posts: 105
Yes, my nitrate and phos read 0. Thought I was close to winning when I saw hair algae on rocks. Maybe my gha suggests I have mainly diatoms in those rusty patches?

Found what he was talking about. It is a diatom filter. Filled with diatomaceous earth . RC thread talking about it but no mention of Dino's: POLL Diatom Filters using Diatomaceous Earth

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