I believe one article has overstated the problems of internal prasites in Bowfin. Since Bowfin come from water that commonly have "problems" it should be understood that some water is full of parasite problems and these fish may have parasites. It should be noted that many waters are pretty clean of major "bugs".
In this case I know the waters very well where these fish came from. I would not blanket treat them for internal parasites. If you see signs of problems I would advise the use of praziquantel per instruction. I've never used praziquantel on bowfin but I have used it on countless other natives with great success (including scaless fish).
I can warn you of one problem "bug" from that water though. I've had about 10% of the fish from water close by (less than one mile) that have anchor worms. This can be treated with dimilin but tends to be a bit harsh on the fish. This medication is also difficult since it has a long medication period. I would not treat for anchor worms unless you see them. They can be seen easily with the naked eye and removed with tweazers. Removing them will not solve the problem but will slow reproduction. Only adults can be seen and only adults carry eggs. Salt (@ 1-2 TBS per 5 gallons) will also slow the rate of growth or in some cases eliminate the problem all together.
Oh, I should mention while I took care of these guys I saw no parasitic problems of any kind. I also used salt to rid them of the easy stuff with every daily water change. They should be pretty darn clean.
