Zoa shedding skin?

[Sick_man]

Hey so I have this fire and ice zoa that looks like its shedding skin or something. It opens up normal and appears to be healthy but is closed in the picture because its night time. You can really notice it on the polyp in the upper middle. Should I be concerned?

 

[Coralreefer1]

Looks like algae growth...as long as the continue to open up with full extension, leave them alone. If they start to close up you can ray dipping them in hydrogen peroxide and water in a 2:1 ratio of freshwater to peroxide.