What are these yellow "things"

Haggisman14

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Does anyone have any idea what these are??

They started sprouting on my rock in a few places, and are in a high concentration. They are hard to the touch, and have just continued growing.

Any idea what these might be. Just curious, and what to make sure they're okay in the tank.

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Could be bubble algae; if so, get rid of it and several recommendations on R2R as to how best to do it, e.g. emerald crabs.....
 
Thanks Mike, I don't believe it's bubble algae. It's almost like a fluorescent green, and you can't crush it...they seem pretty solid.
 
Hmmmm, has your tank been near a nuclear plant/waste site recently? Maybe with Homer Simpson at the controls, lol?
 

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