Zoas covered in film/shedding?

[Devon5698]

Hello I was wondering if anyone had a idea what type of algae this is. The some of the effected zoas rarely open and the rock colony hasn’t opened for a week. Should I do hydrogen peroxide dip? Thank y’all for the help .

 

[vetteguy53081]

May be lack of water flow and nutrients.
try blowing off with a turkey baster and it should perk them up.