Sponge on bottom of LR?

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jolopy409

Aquarium Advice Apprentice
Joined
Dec 7, 2011
Messages
48
Location
Buffalo NY
Well I rearranged my LR while cleaning up some bubble algae and noticed this on the bottom of one of the rocks. Was squishy like like Styrofoam but felt like a sponge.
 

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Most likely a sponge then . :-D I wouldnt take it out of the water again if you want to keep it, they collapse when when exposed to air. they are filter feeders and dont need anything special to get by.
 
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