Refugium plant

[CK Amstutz]

I thought I had Chaeto in my refugium, until I saw someone else’s pic. My lfs put this in when I bought my tank over three years ago. It is flourishing and my tank is great, just wanted to know what it is for sure.

 

[NashobaTek]

Looks like caulerpa to me, there's 3 different types that look like a fern or feather.
Mexicana, pasaloids and sertalariods

 

[redfishbluefish]

Caulerpa Mexicana Fern​

 

[Crabs McJones]

Caulerpa Taxifolia