Focus is not sharp enough to tell definitively. The clownfish appears to exhibit symptoms of brook or possibly uronema. The hippo has a lot of problems, black ich may be included.
My camera is terrible, sorry about the pics.
Here's a timeline. It's full of JR. mistakes and now I am learning the hard way which is a life pattern for me for sure.
I set up this tank in the beginning of Sept. after moving.
I used tonga and shelf rock that I bought from a local reefer back in July. He told me that he "may" have had ich but it was OK because I wasn't planning to set up my tank until Sept. If I kept the rock in a Brute with a heater and powerhead for that time it would be clear. I didn't double check the needed time and it was probably shy of 72 days...
I brought a bunch of fish from my old system. RedFin Wasp, 3 PJ Cardinals, 2 clowns, 2 chromis
In Oct/Nov I bought a Flame Hawk, firefish, Midas Blenny and a hippo tang I did not QT them. These were all fro different LFS
In Nov. I bought a BOrb Anthia and a Dottyback from friends. No QT either.
Maybe 2 weeks ago the Tang developed black dots all over it. I set up a 16G tank to isolate the Tang. It took me a quite few days to catch it. It is now isolated and looking much better, I am not treating it with anything just doing 30-50% waterchange every 3 days. The tang was/is eating normally and was scratching on rocks.
At this time all the other fish in DT seemed to be OK, all eating and swimming normally.
4 days ago the firefish died. It showed no symptoms except it seemed pretty lethargic just before it died. I don't remember if it was eating or not as it never really joined the group at feeding time and would wait for food to go past it.
3 days ago the Borb died. It also looks fine, was swimming and eating normally the night before, in the morning it was sucked to the overflow.
3 days ago was the last time I saw the Dottyback. I can't find it anywhere. It's skin seemed a little rough but not white spots more like a texture but all purple.
2 days ago the clowns started showing white spots, the spots were much more visible in the anatic light. At this point I thought it was ich for sure but I wasn't sure that ich killed fish with no visible marks. The clowns were swimming erratically, maybe a little scratching.
This morning both clowns died. They didn't eat last night. They had white spots for sure but also a weird texture that's obvious in the photos.
The Midas Blenny is poking his head out from a rock, he is lethargic, I suspect he will be dead by the end of the night.
The Wasp looks fine although he did jump into the overflow a few days ago.
The Flame Hawk is eating and swimming normally.
The Chromis are behaving strangely, swimming fast and erratic.
The PJ cardinals are swimming and eating normally.
I wish I had better pictures.
Here is the Tang this morning.
I wish I could learn from others mistakes but I don't. Thanks for any help, usually once I have gone through something like this (reefing or real life) I don't repeat the same mistake over and over... feeling like a bit of a dolt!