so as the title Saids it I got these zoas that aren't opening n I've moved them all over to try and find that "sweet spot" but they just do t seem to be happy anywhere n how they are getting like this algae covering them I've tried dipping them but nothing seems to be working
I've had this issue before too. If you have a really soft bristle brush, try brushing off some of the algae from the polyps.
Otherwise do a quick dip in 3% hydrogen peroxide diluted with tank water. The hydrogen peroxide could be a bit harsh so be careful.