It depends on the fish immune system. Some fish are more able to fight desease off.
If a fish has a weak immune system it will come down with desease.
Make sure the fish that you are adding back to main tank has been clear for over a week.
Let us know how you get on if you don't mind.
If a fish has a weak immune system it will come down with desease.
Make sure the fish that you are adding back to main tank has been clear for over a week.
Let us know how you get on if you don't mind.