Algae ID

[Rmckoy]

Added this l5lb rock a month ago .

bought it from the lfs as live rock .
once added to my system it looked “clean” compared to my other rocks , but it wasn’t white .
recently noticed it changing colour and kind of looks like uglies of new rock ..

Is this something I should worry about ?

 

[Miklo_Miklo12]

Oh no, most likely Dinoflagellates, Dino x would help with that

 

[Miklo_Miklo12]

Is there bubbles in the algae ? If it is than it’s not algae but dinoflagellates

 

[mdb_talon]

Is there bubbles in the algae ? If it is than it’s not algae but dinoflagellates

The presence or air bubbles alone does not mean it is dinos. Calothrix for example is a type of cyano that looks very similar to dinos and will also commonly produce the air bubbles.

 

[mdb_talon]

I would wonder if it is a diatom outbreak. Especially on newly introduced rock(if their "live" rock was just some rock they dumped in a holding tank the day before) that does not have good established algae/bacteria.