I'm sorry to hear about your loss, I've been reading your posts about your troubles with these and I looked around a lot to see what would help... this guys blog I read seems pretty good, he mentions trying various meds that supposedly treated them but had little to no effect... he said that a vet told him the worms going around are now immune to most anti-parasitic treatments (prazi-pro and etc.) Heres what he said finally worked that the vet gave him, I hope this helps
Finally, on my 15th call, I found a Vetrinarian who dabbles in Fish Medicine. A breeder of Discus himself, he had encountered a particular nasty batch of Camallanus worms himself.
Through trial and error, he found a wormer that works.
This wormer is Fenbendazole.
So, he contacted an aquatic biologist friend, and they worked out a dosage.
Dissolve 3CC of powdered Fenbendazole in 100ml of water.
Mix well, then add as many bloodworms as you need to feed your fish. Soak for 30 mins to 1 hour, then dump the entire container in the tank, water and all.
So, for 14.35 in cost, I picked up my Fenbendazole in powder/crushed form.
The brand name it goes under is Panacur.
I brought it home, and prepared the first dose.
It seemed to really soak into the bloodworms, changing them to a slightly lighter and grayish color tone.
I fed the fish 2x A Day for 2 days.
I watched the affected fish carefully.
Within 36 hours, all worms have withered and dropped away from the affected fish.
Within 48 hours, I could find no remaining fish with Camallanus Worms protuding.
I followed up with a good gravel vac and a large
water change.
I repeat this treatment in 2 weeks time, and then again in 2 weeks following if need be.
I have enough medication to do at least 7 more doses.
However, I dont think I will need it.
Heres the link if you want to read the whole article...
http://www.petfish.net/kb/entry/154