Hi, I am about 4 months into my first reef tank, I I recently got my first few coral. One of them was a Duncan coral with three heads. It looked really well always until for the past week the tentacles or arms looked shorter and inflated? Also today the mouth started round like a bump? The flow is good, and the water parameters are perfect? Does anyone know what this is, or if it’s bad, or just natural? Thanks, -Ezra
