how quick is quick?

[cattfish]

How quickly can ich kill fish? We had a watanabe angel, blackspot angel, 2 x twinspot gobies( or signal gobies) and a mimic tang die in 3 days of each other. Are some fish more susceptible to dying quickly than others? Our clown fish, coral beauty, flame angel and pjama cardinal seem infected but are still eating and swimming around. I think there is more going on than just the ich. They have some bactrerial disease for sure. We call it fin rot here!!!
Thanks for any clues
Jo

 

[cristhiam]

it depends on the severity of the outbreak, mine was from 3 to 4 weeks. just kept coming back worst. Some fish will become immune to it. in my case one damsel did

 

[kevin2000]

Depends on the type of fish, health of the fish, and the severity of the outbreak. Stocking levels often influence survivability since heavily stocked tanks often have severe outbreaks and the heavy stocking also creates stress which impairs the fish's natural immune system.