General question about tap water and copper

[acomps]

Hello for years I have used tap water with prime to remove the chemicals. Anyway I recently got a hanna tester and it is showing the water with a .1 or so copper readings. I don't have the space for a RODI at the moment. Is this a concern? I recently had an outbreak and in my QT tank I got to testing and I am puzzled. Does tap water contain copper or is the tester wrong? Will this be an issue going forward and for mixing medicines etc.

 

[acomps]

Hello for years I have used tap water with prime to remove the chemicals. Anyway I recently got a hanna tester and it is showing the water with a .1 or so copper readings. I don't have the space for a RODI at the moment. Is this a concern? I recently had an outbreak and in my QT tank I got to testing and I am puzzled. Does tap water contain copper or is the tester wrong? Will this be an issue going forward and for mixing medicines etc.

Also it is a FOWLR