Cynarina coral not happy when not fed

[Plzpizza]

So I have 3 cynarina corals in my tank and I found that 2 of them do poorly and don’t puff out as much if I don’t feed them every 2 days while this other one is completely fine.

it could be that that one cynarina was very healthy when I got it while the other two were almost near death and I’ve only been able to save them by feeding.

not really sure how to help my 2 not so good ones besides feeding. Below is a picture of them when their big and puffy. You can see which one is the most healthy one.

 

[Daniel@R2R Verified Admin]

Those look like they're doing well in your tank. I do think that most LPS of that size should be fed individually.