The Planted Tank Forum - View Single Post - Filling an Eheim 2215 full of ATI hydro sponge
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Old 12-13-2012, 06:29 PM   #9
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I recently set up an Eheim 2217 with a 4 inch bottom layer of coarse Poret foam, then added matrix and other biomedia on top, just to be safe.

It's only been two months, but so far it's working great. I think the ATI sponges would work fine, but would add a little traditional biomedia on top.
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