RadioActiveDE not opening


ive had this colony for about 8 months and within the past few months it hasn't been opening all the way how it use to.
ive done iodine and FW dips to get rid of any bugs that might be bugging it but more than half wont open. i thought the browns may be smothering the greens so i fragged out a bunch of the browns and the greens still wont open
moved them 3 times to different spots and still nothing. i did notice like 4 or 5 clam/scallop things growing on the rock they are on could that be it? all my other zoos are wide open all the time. any ideas guys and girls?

Like a month ago

And Ill have to go take a now picture. Itll be up in a lil while