Hard coral

[Carl C]

Why does all my hard coral get algae on it?
thank you

 

[bradreef]

Algae grows on dead skeleton. Health corals dont grow algae.

 

[srobertb]

That coral is dying.

 

[HudsonReefer2.0]

As said above, exposed skeleton. What fish is behind it?

 

[sculpin01]

Favites with dinoflagellates.

 

[Carl C]

That coral is dying.

Why is it dying ?

 

[vetteguy53081]

Why does all my hard coral get algae on it?
thank you

Check your nitrate which can affect alk. Assure also that your phos-salinity-calcium are not elevated.
How much flow are you providing ?

 

[srobertb]

Why is it dying ?

Too much light. Not enough light. Too much flow. Not enough flow. Not enough calcium. To high alkalinity. Too low alkalinity. Damage from Adjacent corals. Not cut/fragged properly. Something nipping or eating it.

If you can’t point to a single reason why after ruling out the above list…welcome to earth: where sometimes things are not meant to be.