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Does anyone know what this is?I think it may be a feather duster I found this and several others in a filter I use for circulation so i almost never change the filter unless the flow is restricted I have had turbo snails reproduce in my tank. I think this is a feather duster and that it is white because it is in total darkness. thanks for any help
 

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Underwater Demolitions
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11,547 Posts
Hard to say from the pic, I'm thinking pineapple sponge. They love filters and overflow boxes, and don't need light.
 

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Underwater Demolitions
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11,547 Posts
Excellent! Unless they are clogging something or causing other problems, leave them be. They are wonderful filter feeder, and sponges are generally a sign of a healthy tank.
 
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