ID please on blueish

[action21]

I just got my chaeto rocking and rolling nicely. These blue things are now growing on wall of refugium. Should I leave alone or does this need to be taken care of ?
Thanks in advance

 

[action21]

 

[mort]

Looks like blue ochtodes algae or blue hypnea algae (ORA sell it but there is massive confusion between the 2 species). If it is then it's a cool beneficial algae that you can trade if you like but will do the same job as the chaeto.

 

[reef lover]

+1