Hello my name is Melanie and I am new to the saltwater aquarium hobby. I have had 20g Red Sea max nano cube for about a month now and really enjoy it. The aquarium has made it very easy to get started. I bought live rock at my local fish store and I noticed I have this little pinkish purple things on my rock. Does anyone know what those are? I am excited to start this hobby and look forward to contributing to the community.