Probably it bleached due to the stress caused by the shrimps and moving around.
Just maintain what u did before this and its colour should come back albeit very slowly.
Maybe can use brightwell koralcolor also?
Ah beng during lunch have :
Emperor (one is yellow tailed, medan I think)
Blue Face
Koran
Yellow Bellied Regal
Powder Blue Tangs
Yellow Tangs
Sailfin Tang
Niceee thought of doing the same but in reverse instead adding a small brazil queen in the future.
I believe u would really appreciate the blue colouration in the belize now that u can see both in the same tank lol.
Good luck to your queens! May the odds be forever in your favour. Maybe this link will be of help or inspiration.
reefhobbyistmagazine.com/archives/vol_6/issue22/index.html
Acclimatise it slowly by adding ur tank water into the plastic bag.
Do it a few times over a course of 30mins-1hr.
When going to release, off the lights.
Rearrange the rocks if u can.
Hope this helps.
Just a little more info on iwarna, marginalis butterfly one piece.
Two very very small flame and one very small potteri in the small tank.
A small maroon clown with incomplete second bar in the $8-10 tank.
Easily 10 small rbtas.
Lets hope its not brooks or lymphocystis.
Maybe u can look through the pics on this website to see if theres any similarity.
forums.saltwaterfish.com/t/127010/diseased-fish-pictures