
I think these bags will serve me as filter media for my Eheim Classic 600 (2217) filter but not the size I originally bought. Since my filter is about 7 inches in diameter, I ordered 8x12. As a result, the filter material unfortunately cannot cover the entire 7β³ area. This is important, otherwise the water flowing through the filter will take the path of least resistance and not get through the filter media. I wish I had taken a picture but I didn't. I think the larger size, 12x15, would fit better, but I would like the seller to provide some sizing information to help people choose the right size.

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