dying coral

I was gifted this cube tank I think is about 12 gallons, about a month ago from a friend who had it for about 5 years prior. The tank is super stable and water quality is stable. It’s got a solid fan head but has been running off natural filtration(sand, rock, etc) since it was started. Water...

I bought this healthy leather frag Saturday. Brought it home and got settled in to the tank, no problem. It's been doing fine, but I noticed that the nearby Kenya tree and zoas aren't opening fully. Noticed this morning the leather is droopy and seems to be shedding, which I read is normal...