The Planted Tank Forum - View Single Post - Gh keeps dropping
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post #13 of (permalink) Old 11-14-2012, 03:41 PM Thread Starter
Algae Grower
Join Date: Mar 2009
Location: Toronto, Canada
Posts: 79
No it wasn't old. I have a 2l container I filled a media bag from in July. The purigen was only slightly brown on one side.
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