The Planted Tank Forum - View Single Post - Active substrate end of life, time for a new tank and idea
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Old 12-23-2012, 02:29 PM   #36
Soothing Shrimp
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So, just for kicks I did the math on this since I'm driven crazy by the weirdest things. LOL

If this is a 10g tank, the sponge you have roughly covers 120 inches.

If 4 large double sponge filters covered the back wall, it would cover 129 inches because of the cylindrical shape and top/bottom areas as well.

One thing for sure. Yours looks less obtrusive!
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