How many QT new or sick fish for ich?

[GreenSpottedPuffer]

Originally Posted by Patrice

Quarantine can only help. That I am sure. However, what GreenSpottedPuffer said about QT time is interesting. For how long do you QT your fish? If what he said is right, my QT give me nothing.

Well QT always does something and always helps. My belief is that it gives the fish a chance to get strong and healthy enough not keep ich away.

The point was that if you do a quick search with google scholar, you can find all kinds of studies where ich lived without a host for longer than 6 weeks...in one it was almost 3 months and then they stopped the experiment. So I was saying in that case, your tank may still not be ich free even after going through all the pain of QT for 8 weeks. I hear it quite often..."I had my tank fishless for 8 weeks and I still get ich"...thats because ich can live longer without a host. I am not sure where the 8 week thing came from. I assume most will die after 6-8 weeks without a host.