nuisance algae

[Shawn biocube 32]

Need help figuring out what this is. It’s all over the sand

 

[SaracensRugby]

Looks like Cyano....

 

[Shawn biocube 32]

It’s purple in color at first then as it gets older it get darker and thicker. And also get bubbles in it

 

[marlinmon]

It's cyanobacteria. If bubbles are forming then dino is probably eating it. You've got a nutrient issue. Excessive feeding, inadequate export. What are the tank specs?

 

[Shawn biocube 32]

Calcium. 500 ppm
Phosphate. between 0 and 0.25
PH. 8.2
Ammonia. 0
KH. 214.8
Nitrite. 0
Nitrate. Between. 5.0 and 10.
Salinity. 1.026