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Greetings fellow hobbyists,

I'm trying to figure out what's growing on my live rock and next to my corals. It looks like small white tubes and it's growing around the base of my coral and other spots. I'll post a picture when I can. It has a stream of slime or string substance swaying in the water too. Any thoughts


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Staten Island
Pineapple sponge looks like it. Is it dangerous

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Not at all. They're just a filter feeder. They also only tend to be found in young tanks, no clue why, that's just what happens. When I first set up my tank way back when they were all over the inside of my wet dry filter, then all of a sudden they start disappearing until you cant find anymore.

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