When your coral looks sick do you take action or hope for the best?

[zaq11]

We all know that sinking feeling of walking into the room to view your reef tank and seeing a coral that looks to be sick or getting sick! It has happened to us all and it doesn't feel good. Obviously some coral can "look" sick but not really be suffering from sickness. But there are certain coral that you know without a doubt when they are looking bad! So when that happens what do you do? What's the steps you take? Let's talk about it!

1. When you see one of your corals looking sick do you take action or hope for the best?

2. If you take action what are the steps you take to try and save the coral?

image via @Zero Nitrates

I will take action because if you do not do anything you may loose the rest
first I will check alkalinity and phosphate , nitrate and do what needs depend on the finding
then I will check the tank and try to find what wrong , make sure the skimmer is working fine , and the powerhead pumps working
if I don't find a reason , I will do a good water change