advice needed --> advice taken -->update July 27

[Aquattro]

After a couple of good water changes, I just left it with lots of GAC running. I found corals I tried to frag just got more stressed and I lost the whole colonies. Once you've got a decent handle on it, wait and see where it goes. Minimal lights for a couple of days too. keep temp a bit lower to increase O2 saturation, and lots of surface agitation.
I'd mix some new water and get the sump going, that will increase O2 uptake as well, and get the skimmer going and clean it as required to keep it empty.

[Jason McK]

Oh No Christy sorry to read of your troubles. I would get that Sump online. Maybe dump the water and give it a good rinse out. That way you'll be able to get your skimmer fired up. Get some filter floss in there and a ton of carbon.