q-tip sponge? maybe?

Ashna

Reefing newb
this is growing on my rock lol any ideas? theres alot of them
 

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Depends on how dirty your water is. They are filter feeders, so if you have more nutrients in your water, they can grow faster.

When i first started my tank they multiplied pretty fast, but as it has matured, i hardly get any now.
 
Yea, its the same thing. They normally come round after a cycle and then within a few months just disappear. dont know why. Weird. :?
 
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