Algae ID

ZzyzxRiver

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I went to bed with no unknown algae and woke up with bubble algae on one frag and whatever this is on another. What am I dealing with here?

IMG_9493.jpeg
 

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Looks like ulva, also known as sea lettuce. That stuff can become a problem quickly so I suggest getting it out. Some people with a lot of herbivores let it go, but that can be dangerous… If you notice more, urchins are a great CUC member to add.
 
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