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I bought a Sinularia on a small rock from the group a couple of months ago and soon after noticed some small (1/8 inch) shiny "spheres" around the base. These have grown steadily in size and are now and inch or so in diameter. Can anyone tell me what they are an if I should be concerned? Sorry...

I'm planning to assemble a ~120G reef tank. My closest experience is keeping saltwater tanks 20 years ago with under-gravel filtration, so I have a lot of learning to do! I've read and researched extensively and understand lighting pretty well in terms of types, color/wavelength, animal...