Why is this Happening?

[NanaReefer]

To my Chalice & Brain. Little tufts of algae?

 

[Salty1962]

Looks like algae that has grown on exposed skeleton. I've had it as well, just keep your corals healthy and they'll push the algae back off.

 

[NanaReefer]

Thank you.

 

[ritter6788]

Little dead spots on the coral. Salinity, alk and source water purity are the first things that I look at when I have coral problems.