Newbie here. I purchased my first few pieces of coral recently. I was told that the one pictured here is a cabbage coral, tho the guy working didn't seem overly confident. While doing some research I read that it needs space between it and other corals which brings me to my issue. There is another type of coral growing on the rock. It was small when I bought it but it has since grown and now they are touching. Is this an issue or am I just freaking out over nothing?