Losing fish to vortechs :(

[dynamite]

Ok, so after half an hour of chasing my Yellow Tang and destroying my aquascape I gave my yellow tang a 6m freshwater bath to get rid of the black spots... and apparently they're gone. He's stressed and hiding And I hope he survives to this bad experience of swimming in freshwater.

I don't want to stress him more so I'll re-aquascape the tank tomorrow, I'm afraid to lose him

I also found my Candy Cane Pistol shrimp! I thought he died or something... Now he shares the same rock with my Yasha Goby but not the same entrance