What is this?

[austenreefer]

It’s growing on one side of my tank (the shadier side) and is on 2 of my corals, GSP and DSP.

 

[ArizonaAquatics]

Looks like green algae or green cyanobacteria. I would remove what you see from the tank and increase the flow to that area to discourage future growth. What are your parameters looking like? Also, is it furry/stringy or does it look smooth?

 

[austenreefer]

Looks like green algae or green cyanobacteria. I would remove what you see from the tank and increase the flow to that area to discourage future growth. What are your parameters looking like? Also, is it furry/stringy or does it look smooth?

Smooth. It all pulls apart at the same time. And that area could definitely use more flow so I’m sure that’s it

 

[ArizonaAquatics]

Smooth. It all pulls apart at the same time. And that area could definitely use more flow so I’m sure that’s it

Yup sounds like green cyano to me. Definitely increase flow to that area and see if you can get it to cease growing. Also check nitrates/phos because cyano really likes low nutrients and low flow!

 

[Duglis]

I always thought this was cyano. Increase flow?