I would not treat more than three times with Parasite Clear, Camallanus worms are tough to get rid of and I've had great success with Jungle's medication. I would stop the tabs and start the medicated food, it will be used three times per week for four weeks if I remember correctly. The other option is Levamisole which available through a vet with a prescription and will be costly since most vets don't just write scripts without seeing the fish if you can find a vet that treats fish is tough too.