What is this?

[JBslick81]

I have seen clusters of these in my tank for a while and thought it was some weird algae. They look like little plates on the rocks but I just found some on the glass and they look like tiny worms or aptasia.

Should I be worried?

Hard to focus on glass.

And here on the rocks.

They are on the sand bed too.

They are everywhere!!!!!

 

[Mal11224]

Looks like flatworms to me.

 

[Reefpuck]

Flatworms.

And you got quite a few of them. Different ways to go about treating. Just do a search on flatworms...there are already hundreds of threads on treatments/experiences.

I personally used Salifert Flatworm Exit once (reef safe), but it didn't kill them all and the population started coming back. I ended up just purchasing a melanurus wrasse and that fish for the most part has kept their population near diminished.

Not to fret though...they aren't the worst thing to have in your tank!

 

[JBslick81]

Crazy.

 

[JBslick81]

Let’s start a “Who has the most Flatworms” contest.