Paul B, i am glad I found this post. This has been bothering me for some time. I actually had this written up and PM'd it to a couple of respectable reefers because I didn't want to post and get flamed or give someone the idea that they shouldn't quarantine. I have been flamed in the past for suggesting that someone look to other issues with their tank if they have a ich problem. My list of fish is in my sig. They are not 18 years old but I think they will be somday
Here is what I had written before I saw this post:
I see that everyone advises to quarantine and leave tanks fallow for 6-8 weeks to remove ich from a tank. I have 15 fish in my 210 that I have not quarantined and have never had ich. I have 4 fish in my 24 that had no quarantine and no ich. I lost two fish over the course of nearly 3 years that refused to eat and slowly died despite all my efforts, and freezer full of food. (Lesson learned about watching fish eat before buying them). I also had a couple carpet surfers, but I have never had one get ich. I have a clown ( months at the point of illness) that jumped in the overflow and we didn't find him for a couple of days and got really stressed out and developed some kind parasite (not ich very fine powdery dots, prob velvet) that wound up rubbing his whole tail off and laying on the bottom of the tank. I thought he was a gonner, but I was able to save this fish by careful treatment in a hospital tank. No other fish were infected.
5-6 months ago I added a fish that did have some ich (very little), but once in the tank it quickly went away and no other fish has ever shown a sign of the parasite. I know it was risky but I guess I was testing my theory. I have 3 tangs that never have shown a spot of ich.
I do carefully pick out my fish and inspect them all daily for signs of illness.
I have added these fish very slowly and there are generally months between additions.
I guess there are a couple of conculsions that I could draw from this experience.
A. Healthy fish don't get ich/Possible immunity. Exposure combined with health creates some immunity?
B. Some condition in the tank is inhospitable to ich? Ich predator or some other environmental factor.
C. So many fish in QT show signs of illness because of the stressful nature of quarantine. Ich is stress related and sign of bigger issues either environmental or nutritional in a system. I guess this goes back to theory A.
D. Diet has something to do with ich? Garlic?
E. Blind Dumb Stupid Luck and tonight I will return home to find all my fish covered in ich.
F. There is a magic bullet that we don't know about. Luck of the draw kind of hitchhiker???
I do not have ozone.
I feed vitamins and an extremely varied diet. I do add garlic sometimes. All fish are fat and have great coloration. I have a pair of cleaner shrimp that I have seen new fish visit. The established fish do not make appointments with the cleaners.
What about the folks that let their tanks go fallow and then get ich again. I have read posts where they are told that they must have introduced it on rock or some such item added to the tank. Can this parasite go dormant in one of it's stages? If not how can we be 100% sure this isn't the case?
Thanks and I appreciate any thoughts you might have,
Lisa