ich on new fish

[ku]

I was just wondering, every time I get a new fish and put into the tank, it only get signs of ich. And I was told to put the sick fish in another tank until healthy again. But when the fish looks better after a few weeks I put it back in and the fish again shows sign of ich again. Then I was at a fish store and I picked up some garlic juice and added it when I add new fish and it went away in about 2 days.
So, my question is could the white dots just be stress spots and not ich? Because even time I put a healthy fish into my tank they get small white dots but only about 5-8 dots only everytime.
And my last fish I put in I say white dots for about 2 weeks and added garlic and went away in about 2 days.
Another question, WAS this luck or is adding garlic better than putting the new fish in another tank until looks health for weeks.Because when the sick fish is healthy again and put back in the main tank it get the dots back in a day or two.(and I did this about 3 times moving the sick fish into it own tank and putting it back when healthy again)And everytime it got the spots again. Then I used garlic on my food and it went away in 2 days and has not come back in the last 3 weeks. And they all are health now.

 

[beth]

Ich is a cyclical parasite which is why it appears to “come and go”. However, once you have introduced this parasite into your tank, it will not go away permanently until you treat it, and get rid of it. Garlic can be a deterrent for mild cases of ich, but the only real viable treatments are hyposalinity [explained in the FAQ Thread] and copper. We recommend hyposalinity because it is equally as effective and safer for fish.