Hammer coral

[Ant8689]

I have 2 hammer corals 1 is green which is doing great and 1 is yellow which has not opened in a few weeks it is not dead just won't open up anyone have a clue why this is happening?

 

[Nottick]

In reference to the other one. What's the placement? A lot or little flow compared to the other etc?

 

[Ant8689]

They are right next to each other but they are not touching. They are both on the bottom on a rock with medium flow. I have moved the yellow around and no better. I thought it would be better when I upgraded my lights but same result