HI Lynn,
I have used FLuke tabs, not for flukes but for other things and I thought that after several treatments it was hard on the fish , including the fins and it really seemed to affect their apetite.jmo
Prazi for 21 days is shown to be effective if not interrupted in the 21 days. It is also considered to be safer than a lot of meds.
Flubendazole is preferred by some for flukes, but "sometimes" can have an adverse effect on the fish (possibly allergic reaction ) and the fish die.
Here is a link http://forum.simplydiscus.com//index...;threadid=1080
The treatment for Prazi that I have seen used for flukes is
1/4 tsp /20 gal, wait 48 hrs change 50% water, then wait 24 hrs, change 50% water, then redose full dose
repeat above until 21 days has passed.
There are other ways people use Prazi also. Keep in mind that Prazi is a dewormer for tapewworm and if the fish have tapeworm, it will come out, so don't be surprised.
Here is more info on flukes if you want to read
http://forum.simplydiscus.com//index...;threadid=1075
hth
Ardan :sunshine: