Very Odd Copperband Issue

[Jay Hemdal Verified Community Expert]

Okay, will definitely pull him out then, what is formalin, i read it was methanol and formaldehyde but that doesnt seem right to me.

Formalin won't help with internal uronema though - the protozoans are deep in the tissues of the fish, the formalin doesn't pass through the fish's skin. Same thing with chloroquine - I demonstrated that it kills uronema in the water, but it does not cure the fish that already have the issue, since the chloroquine does not get down into the tissues....

Jay