Hyposalinity and Copper/CP

[Allan Lim]

Hi. I would like to ask if I can do a hyposalinity of 1.009 while on CP or copper? Will there be complications or adverse effect on the fish if I combined both during quarantine of at least 30 days? TIA

 

[Jay Hemdal]

I never do that. My basis is that copper is more toxic in freshwater, and hypo and copper are both stressful, and I worry that both together will be too stressful. That said, I’ve run copper for decades at specific gravity of 1.020 with no problems.
Jay