Brown Sponge?

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Tank2379

Tank2379

Aquarium Advice Addict
Joined
Jul 16, 2008
Messages
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Location
Chicago,IL
Is this some type of Brown Sponge? it's starting to spread to my other LR? Should I be worried? Sorry I took these pictures with my camera phone....

img_931538_0_e635449ff3af12800f1697581c0caece.jpg


img_931538_1_d58a3ad2ff7cac839101ac48f0ad7a95.jpg
 
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