Originally Posted by douggiestyle
there are a few small feather worms on the rock and they open each day also.
Are you refering to small dusters with soft tubes? If so, remove them from the coral. They are most likely part of the irritation that could be keeping them from opening up. These guys can sometimes reach plague proportions which can hamper coral health. Keep an eye on them.
Also keep removing the algae until it stops coming back. As long as there is algae on the coral it will continue to stay closed, even if partially. I would increase the water change to 10 gal
weekly as well. It will correct issues with chem a little better provided the salt is also up to par. Ease off the trace element additions. They will fuel algaes as much as anything, especially iodine. Half the recommended dosage Â½ as often.
and others have said, it may just be a matter of finding the right spot. Water flow being at the top of the list....