What is this?

[Potatohead]

I found some of this in my overflow. Should I toss it or put it in my fuge?

Thanks

 

[Coralreefer1]

Caulerpa which is a macro-algae. It’s kind of an invasive macro that if able to go sexual will cause issues with your tank.

 

[Potatohead]

Ok, I’ll take it out. Thanks

 

[Coralreefer1]

You are much better off with species like gracilaria, chaetomorpha, Halymenia, Halimeda, Ochtodes and Ulva

 

[AlgaeBarn]

You are much better off with species like gracilaria, chaetomorpha, Halymenia, Halimeda, Ochtodes and Ulva

Agreed

 

[acbaldwin]

That's Caulerpa brachypus. I've had tons of it, never had an issue with it going sexual. That particular variety grows incredibly fast, and can be kept free floating in a ball like chaeto.
It can be invasive if you let it get into your rocks or other macros, but it's easier to keep confined than chaeto is. And it's not really invasive (like F***ing Dictyota is!) I love it because it's the only macro I've seen other than Cladophora that can grow in a low carpet (picture mine):

Also grown free floating:

 

[Potatohead]

I already have had chaeto for a long time, I just happened to find this in my overflow. Must have come on a frag or something.