Below are a couple of other threads on R2R of similar experiences with firefish flashing. Not sure what the issue is, but it didn't appear that copper and prazi worked on any of these previous firefish to stop the flashing either.
Thread #1
Thread #2
Yes they can. Flukes drop off the fish, lay eggs, hatch, and then reattach, so it can infect any or all of your fish. Saying that, not all fish are as prone to them as others.
And we don't know for sure we are even dealing with flukes... it might be something else still.
The only fish I've had in QT over 30 in copper and prazi and still have issues, turned out to be bacterial.
Thread #1
Thread #2
If I introduce the fish to my DT, what are the risks to my existing livestock? I have 2 clowns and a mandarin, all 3 fish have been in the DT for 3-5 months. Do flukes jump species?
Yes they can. Flukes drop off the fish, lay eggs, hatch, and then reattach, so it can infect any or all of your fish. Saying that, not all fish are as prone to them as others.
And we don't know for sure we are even dealing with flukes... it might be something else still.
The only fish I've had in QT over 30 in copper and prazi and still have issues, turned out to be bacterial.