I just found a bottle of prazipro and it’s not expired!People have found that copper power needs to run at 2.5 to control velvet. That’s the same as coppersafe.
I looked at the video - the fish was breathing so shallowly I could barely see any gill movement.
If water quality has been ruled out, gill flukes can also cause rapid breathing. Are you planning to treat with prazipro?
Jay