help!!! this is my first time having ICH i dont know what to do!!

i have a 100 gallon half reef half fish display tank and i just purchased a humu humu the other day. He is doing great in my tank.. but earlier today he started to have white spots on his fins. i think he has came up with ICH!!!! i need to take him out and put him into my quarantine tank. any advice on what else to do in my display tank? do i medicate the entire tank?????


i have....

a 100g tank
20 g sump/refugium

tomato clown
pink skunk clown
2 square spot anthias
a Hawaiian puffer
dog face puffer
humu humu trigger
2 fire fish
raccoon butterfly
a blue angel fish
diamond head goby
bi color blenny

humu humu is the only fish with the spots


HELP!!!!!!!!!!!!!!

you have pm.

They've all been exposed now. But take him out and treat him. In the display tank run a UV sterilizer to kill any ick sporasites that hatch. This will reduce their population and help protect the rest.