What ferts do you use? Unless you get shrimp-specific, all have trace elements of copper.
I believe we all have to do what we think best no matter any one else's experience unless they are being told what they want to do is harmful. Otherwise, if a person has the slightest bit concerned it is better to do what one's gut tells one.
As an aside, you may have seen this. I have it bookmarked because I refer to it so often....along with the research on the "fix" meds.
Aquarium Fish Nutrition | Fish Food Information & Aquatic Health
If your dog thinks you are the greatest do not seek a second opinion
Last edited by RussellTheShihTzu; 11-03-2019 at 11:09 PM.