I got u kathy so I need to remove all fish and starve out the display tank basically right I have a 40 gallon that I'm gonna set up I guess and if the fish don't look better by sat I'm gonna ripe apart the tank again and catch all the fish and threat them all I never had any ich problems and I'm going nuts right now tryin to dicede what to do kathy people are saying that ichs alway in a tank so if I get all the fish out and don't treat the display tank then even though I starve it out won't it come back I'm confused
Yes, they all have to come out unfortunately

The longer you wait the worse it will get and you may start losing fish.
Once all of the fish (hosts) are out of the tank - ICH CANNOT SURVIVE WITHOUT A HOST -IT IS A
PARASITE (not yelling, just don't want that missed

) - it will die off.
par?a?site
/
ˈp?r
əˌsaɪt/
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uh-sahyt]
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–noun 1. an organism that lives on or in an organism of another species, known as the host, from the body of which it obtains nutriment.
IMO it is not true that ich is always in a tank.
I have sat here for years reading threads on ich and I truly do not believe that it is in every tank.
IMO people believe that because they post 'I haven't added any new fish in (pick a time frame...), how can I have ich?'
So many threads...

My thought is many folks get it in corals they buy that come from a tank that has Ich in it.
Frightening thought isn't it?
..and a good reason to QT everything you put in your tank.
I have walked away from buying frags when I see Ich on the fish in a tank I am buying from (really wish folks who know they have Ich wouldn't sell frags (also sand, chaeto, rock...) from their tanks out of respect to others...)
If there is just 1 living ich parasite in something you add to your tank..and remember tomonts (the reporductive stage) can live for up to
35 days (that is the max I have seen written about in various studies, but this usually averages around 28 days), so anything you purchased within the past 35 days could be the cause of an outbreak.
This is also why it is suggested you leave your tank fallow for 4-6 weeks AFTER an outbreak - to be sure the Ich Parasite is dead.
If Ich was in EVERY tank - nobody would ever be able to get rid of it.
..as I said IMO...
Charlie - try and look at it as a new chance to re-aquascape. I know getting the fish out is a royal pita, but it's the only way to irradicate it from your tank.