Black spot on blasting?

[Deonne]

hey, just noticed this black spot appear on the usually green spot of my blasto. I got the blasto about a week ago. Any ideas? Thanks

 

[Oscaror]

hey, just noticed this black spot appear on the usually green spot of my blasto. I got the blasto about a week ago. Any ideas? Thanks

Probably expelled zooxanthellae

 

[Deonne]

Probably expelled zooxanthellae

What would the cause of that most likely be?

 

[Oscaror]

What would the cause of that most likely be?

Most likely lighting but to be honest I don't know for certain, which is why I didn't say it from the beginning. Surely the #reefsquad can help though

 

[Deonne]

Most likely lighting but to be honest I don't know for certain, which is why I didn't say it from the beginning. Surely the #reefsquad can help though

Hah ok thanks. The coral otherwise looks quite healthy to me, very open and plump.