Update - About a month ago, I had to go away on business. When I got back I notice some salt splash on the side of the tank and thought I had a leak.
Well, it was not a leak. While I was gone my son did not follow my instructions. Instead of just puting a pinch of food in the tank to feed the fish, he instead tried to pour the right amount of pellet food in and accidently dumped in about an 1/8th of a jar. He then tried to scoop some out but he did not get enough out.
The effect of this spill caused hair algae to run rampant. Then my corals stressed, one coral died, the clam died and a snail died.
As soon as I could, I cleaned up the tank, changed the sock, skimmer, and did a water change and then waited.
Everything is now getting back to normal. the soft corals that were stressed and shrunk up, are now growing again. The corals are still a bit stressed but I hope that changes soon.
During this month long event, my fish were fine and I did not lose any fish.
The one interesting thing is that my weekly water parameters never really changed. I am guessing that there was a spike but it never showed up in my testing.
The hair algae has been reduced by about 90% but still have some on the high rock, which is fine as the 2 tangs have cleaned up things fairly well. Algae on the glass was growing like crazy a few weeks ago, but now is growing very little, and only needs to be cleaned one a week and there really is not much there.
Anyway, as it is tax season anyway, I will let the tank settle for the next 4 weeks and then I should be able to add some corals again and a couple of fish.