Had a rough move from my 55 to 75 and to a different house, Anyway my xenia has diminished over the last week, and now is just a small bump on a frag rock. Everything else looks great. My nitrates are around 20, I have another protein skimmer comming next week, which should help with the water quality. Question is should I leave it in the tank and see if it comes back, or get it out. Thanks for any info