Torch coral help?

[Darylb]

Any reason why only one but of my torch coral it out and the rest are sucked back into the skeleton? I have no fish or shrimps params are all good now all other corals look fine I do have 2 turbo snails but they aren't near them

 

[melosu58]

Is this a new coral? Is it getting too much flow. If you see the other heads start to fall apart you`ll need to break the infected heads off and discard as it has the brown jelly disease. When you say water test are OK what are you testing for?

 

[Darylb]

I've had it for about 2 weeks and I did leave the lights on for a bit longer than usual as soon as I turned them off they all spread out again and I'm testing ph ammonia nitrite nitrate calcium phosphate and I forgot the other one