ThRoewer
New member
...
Do you use copper? Or formalin for brook?
I usually don't use copper. The only exception would be an Amyloodinium infection of fish that can't handle CP.
Hypersalinity is IME the better measure against Cryptocaryon. For tiny fish like pipefish and small gobies, I generally do TTM
Formalin dips are still the best measure against brook, but formalin gets harder to find these days.