<a href=showthread.php?s=&postid=12869932#post12869932 target=_blank>Originally posted</a> by davidryder
Fish are typically immune to ich and it isn't abnormal to be present in a tank which have fish that are showing no symptoms of ich. The hypo is good for treating fish in a tank with inverts but it won't necessarily destroy all the ich in the tank.
A healthy fish should be able to resist ich. The best thing to do probably is to QT the infected fish and treat with copper. The best preventative measure is to QT fish before introducing them.. but even that doesn't ensure 100% the prevention of the introduction of ich to your tank.
I have to respectfully disagree with most of this post.
1) Fish are not typically immune to Ich....very few are resistant to this parasite.
2) Hypo should never be used in a tank with inverts. It will kill them along with the Ich because they cannot osmoregulate any better than the Ich parasite.
3) Hypo does work very well (if done correctly) at killing Ich.
4) Healthy fish will not necessarily be able to fight off ich. Because of the life cycle of this parasite it's numbers grow exponentially in an enclosed system such as our aquariums. It will reach levels that even the healthiest of fish will not be able to deal with.
5) Copper Does work very well, I agree with this point and is what I prefer to use.
6) I also agree that QT is a must for all fish, coral and inverts.
7) QT can and does 100% prevent introduction of Ich to an established aquarium.
Just passing along what is considered to be the most up to date info concerning Ich treatment...
