ThRoewer
New member
Thank you, Copper it is. Will ramp up slowly as suggested
I wouldn't treat six-lines unless they actually get sick, especially not with copper. Like mandarins they usually slime everything off that tries to infect them, but copper may interfere with that and on top also lower their immune response.
If you want to do prophylactic treatment against ich with such a small fish why not just do TTM with 2.5 to 5 gallon tanks?