It might be a bit like it, yes. But its hard to tell, – the paros in the tank dont look too bad as far as I can see.
But the chocolate doesnt look happy at all. And it does have like a grey shimmer to it. Chocolates though are really sensitive, and if stressed they can look so awful. This one at least has some colours. But they are delicate fish.
I think I would leave the tank in peace for a while, and try and stable the waterparameters again, have a good temperature, – and then observe if they get worse. Maybe see if you can find some spirohexol in the meantime.
Odinium if so, will not kill the fish just like that, – it develops kind of slowly. But I only know it with paros, not chocolates.
I will have to log out here .. getting midnight here in Denmark, but hope it works out for you.
One last thing, – theres a lot of light on the tank, – the paros probably will live with it, the chocolates might get more stressed from it, I think.