Theses are everywhere in my tank what are they?

Hop2jr

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Losing coral so I took a close look in my tank and these are everywhere on my live rock, can you please help me ID, if they are bad and if they are bad hoe to get rid of them. They are small I mean tiny 1/4 max tall by 1/16 thick.
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Rogued_Reefer

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Vermetid snails and loooots of them. They can irritate corals when they send out webs to feed. Best way to get rid of them is to close their tip with glue 1 by 1 or crack them open from their base so the worm dies
 

F i s h y

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It would be easier replacing all the rock or use a wire bush they are everywhere it’s a 75 gallon tank 150lb of live rock
Just do a bit at a time... each time you clean or something... a few aren't terrible but a bunch can be a problem...
 

Vette67

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They could also be colonial hydroids. Not necessarily vermetids. They are easy to mistake for each other. I have a pretty healthy population of colonial hydroids in my tank, and they don’t bother anything. Look at the animal coming out of the tube. If it looks more like a feather duster, then it’s hydroids. If it looks like snot, it is probably vermetids. This is what the hydroids look like in my tank.
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Vette67

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Six-line Wrasse will eat them, mine keeps the tank clean of them.
6 line might eat vermetids, but my 6 line definitely does not touch hydroids. Be sure of what they are before buying an animal as a solution. Unless you want them gone, then the brute force method of crushing them with hand tools works on both.
 

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