Thanks for the advice. My son is pushing for a 100g tank so that looks like the upgrade soon.Is the bar just turning grey? Hard to tell from photo. I have seen clownfish bars turn grey.. just seems to be a mutation. Usually it is the tail though and they call this "dirty tail".
The fish does look kind of bloated and bar is almost sunken? So it's possible something is going on here.
You won't be able to fit all those fish in a 29g. Aggression will likely be an issue. Clownfish should be kept to 2 per tank, especially small tanks as they tend to pair off then fight others when they mature. I probably would not add the black damsel, depending what kind it is.. but being black, it is probably a feisty one and potentially gets large.
Angelfish can also turn into bullies. Having lots of swimming space and swim throughs/rock/territory can help.
You got a list of a lot of nice fish there, just need to settle on which ones to keep.
The white stripes (all) on the Clown are turning gray/ dark. Noticed unusual swimming today too.