ID please

[Baiggann]

These bubbles are starting to show up. My tank has been going for 4 years. Parameters are normal.

Any help?

Thanks

 

[Halal Hotdog]

Looks like dinos. Any dramatic changes to your system? Have you started carbon dosing? New salt mix?

 

[Baiggann]

No changes except..... started dosing Red Sea Trace Elements about a month ago.

 

[TripleDogDareYah]

Hard to tell. Some form of algae... cyano or dinos are likely. Hope its just cyano...