<a href=showthread.php?s=&postid=15522796#post15522796 target=_blank>Originally posted</a> by Paul B
Although I can't say is ich is in everyone's tank or not but it is definately in my tank and has been for 40 years.
In the summer almost every day, or at least once a week I get down to my boat and collect either water, mud, rocks, amphipods, seaweed, snails, worms etc. These things are all put into my tank in small quantities but I mainly want the bacteria. I am in NY and do not quarantine any of this stuff. I have also been buying fish all of these years and putting them in my tank.
I have not seen a case of ich since the eightees. I will only see ich if a fish is near death from something else like old age or jumping out.
From my observations, in those 40 years with my still running tank I can deduce that ich is present in my tank and that due to the health of the animals, they do not exhibit ich symptoms.
My fish are in breeding condition, I know that because many of them are breeding. Ich is not a problem in my tank which means it should not be a problem in anyone's tank. I am not big on water changes or maintenance so it is not due to that.
If your fish are not breeding or making spawning jestures, they are very suseptable to ich and everything else.
I can put an obviousely ich infected fish in my tank (don't do this) and it will either die or be cured but none of the other fish will get it, ever. This is from 40 years of observations, not just a few weeks.
Fish can be put into breeding condition very easily but it takes a little work