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They're everywhere! What eats these filter feeding jerks?
Here you can see all these dark spots on the rock. I've always had them (for over 5 years now), but more recently they have exploded. How can I keep these things in check?
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here is a closer shot of them on another rock. You can see the tubes pointing up on the rock.
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Here you can see all these dark spots on the rock. I've always had them (for over 5 years now), but more recently they have exploded. How can I keep these things in check?

here is a closer shot of them on another rock. You can see the tubes pointing up on the rock.
