White sponges???

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Swiftler

Aquarium Advice Activist
Joined
Mar 29, 2011
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168
About a month ago I set back up my 75 gallon tank and purchased some live rock from someone tearing down their tank. Lately I've noticed that there are about 6-7 of these white looking sponges growing in various places. They range from 1/4" to about an inch long. Should I be concerned???

Also there is another unknown which I have I have included a photo of. Any ideas???

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Nope they're harmless. I have hundreds in my sump and dark areas of my tank. They come and go.
 
Last edited by a moderator:
In the last pic, the little white thing looks like a new frilly mushroom. I have a new one on the frag that one of my frilly mushrooms is on, thinking it's multiplying. Will upload pic in a little while.
 
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To the naked eye it looks just like your pic but I couldn't get a good shot with my phone
 
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