Originally Posted by jeffaquarius
I have read a lot of articles similar to that claim but the authors have their own opinions. I speak through my own experience with regards to ich and we have debated about this so many times. I have 3 tangs right now in my 150 gal
. The blue had started to have a sign of ich just last week. It shakes it's head at the back side of tank which tells me there is something irritates it's gills. Once I applied the GarlicXtreme it calms down and now he looks normal. I had an ich outbreak 2 years ago and I did not QT all of them. Just the blue tang and they all survived. Maybe you can share your own experience that wiped out your tank.
So you have fish that host a constant ich infestation because youve never successfully treated it. Their immune system suppresses the infestation enough to not become an outbreak. If you went through the process of treating your fish and leaving the tank fallow it would be gone and wouldnt come back until reintroduced into the tank. Its a prime sign of a healthy tank, keeping the nitrates and stress down boosts their immune system.
Ive never had a tank crash due to ich. In fact, ive never even lost a fish to it although my clowns came close when the infestation started. Fish should never die to ich since its such an easy parasite to control.