Can someone help me out? I have a 10 gallon tank 3 fish: one molly two guppies all male. One of my guppies slowly started to stop eating/got thinner and a day after a red string poked out of his anul. Basically to say: he has camallanus. 90% sure of it. Its not poop i know that much. Ive had the tank running for 10 months and have had the molly for about 4 months and the guppies for about 2 months. CAN ANYONE SUGJEST A MEDICATION TO KILL THESE THINGS?! Ive read up on how hard they are to get rid of and what aquaruimist says work, but does anyone have any sugestions? And if so where can i find these? I ran to the pet store and bought tetra parasite gaurd (i know it probably wont work but if it can treat atleast some of/slow the process its worth it for not until i have a better solution). THANK YOU!