Bubble Coral problem

[sharky71]

I've had my bubble for about 1 month. The first two weeks were great. Now I notice the bubble is receding and some of the bubbles aren't opening. My other corals (hammer, frogspawn, toadstool) are doing fine. I dose with B-ionic about once a week. My water parameters are fine. Any thoughts?

 

[Hormigaquatica]

Look around the areas that are receeding.. any sign of a pest there- aptasia, anemonea, large worms, etc?

 

[musty baby]

Could be getting a little too much light/flow. They're about as low as corals come for light/flow requirements. I burned mine away to almost nothing in a matter of days, as I had never heard that about them.

 

[zoomfish1]

They need to be on the substraite and in an area of little flow.
Other than a pest irritating them, check for flow and too much light. Also make sure no other coral is touching them. They are not communal.