Hammer problem!

[Andre.nicolau]

Does anyone knows what this bubble means? I am a little bit worried!

 

[chaoha]

I'm not seeing any bubble . Looks like a blue mushroom growing out of your hammer

 

[cloak]

The Hammer might be trying to reproduce.

http://www.advancedaquarist.com/2008/8/aafeature1

 

[steelheader.262]

Wouldn't worry about it, I've seen this on a few different threads.
No good reason why this happen but should go back to normal.

 

[Andre.nicolau]

It is not looking good! What do you think?