I have a single head of Duncan coral in my tank. Also have a large head of a torch, GSP, and 2 different mushroom. The duncan has been in the tank for nearly a month and has done well up until the last few days. Ive had to move him around a bit but he's been in his current spot for about a week now and he opens less and less each day. All other corals in the tank are doing well so I'm really confused as to what could be causing this. My main concern is that it could impact the other coral, but no one else is showing signs of distress.
75g tank
4 bulb t5 fixture 12 hours of light, just lowered to 10 to help slow some algae down, may go lower
ammonia - 0
Nitrite - 0
Nitrate - ~0
kH - ~8 (started raising it today towards 9)
Calc - ~410
There is some algae in the tank but nothing around him that would be bothering him.
75g tank
4 bulb t5 fixture 12 hours of light, just lowered to 10 to help slow some algae down, may go lower
ammonia - 0
Nitrite - 0
Nitrate - ~0
kH - ~8 (started raising it today towards 9)
Calc - ~410
There is some algae in the tank but nothing around him that would be bothering him.