This felt is terrific. I am using it for an inexpensive way to filter a small fish tank with ich. Nothing was working so I researched effects of filtering with small micron and water changes. I cut it to size for the filter and replaced daily for several weeks. 72" x 1 yard is a lot of material. I could make daily filter changes for months with this. I'm glad I don't need to because the ich now appears to be GONE! Something the chemicals didn't seem to accomplish. I will continue to use this and definitely buy more when it starts to run out.
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