So I have a 20 gallon aquarium with mostly mollies and guppies in it and they all have camallanus worms. I ordered Fenbendazole from amazon (which was quite expensize and I don't want to have to again) and I'm waiting for that to arrive. (I know it's not as good as levamisole but i'm in canada where levamisole is illegal. It's 3 packets with two grams in each packet.) I have a golden dojo loach that I'm very attached to in a 30 gallon tank that used to be my community tank. He was in contact with the other fish up until about a month ago when there was an ick outbreak so I moved everyone to the 20 gallon tank so I would use less medicine. I then found out because he's scaleless the medicine was harming him. But his ick had cleared up so I compleatly sterilized the 30 gallon and moved him back. He's been doing great since. I think the mollies had camallanus worms when they were living in the 30 gallon but I didn't really know what camallanus worms were until I moved them to my 20 gallon and it got more serious. I really don't think he's infected but one of the infected mollies had some fry in the 20 gallon a while ago and I sort of panicked and moved them in a baby box to the loach's tank so they wouldn't get infected. (The box has little holes in the bottom so they are sharing the same water. Also I tried to make it so no water from the 20 gallon entered the 30 gallon when I moved the babies in but I think a little might have.) I'm now reading that fry born to infected mothers can also be infected but I won't have enough medicine (when it arrives) to treat the 30 gallon and 20 gallon. I just need to know if the fry are infected and if they've infected the loach and all the water in the 30 gallon. Also if anyone has had experience treating a tank with fenbendazole if you could share your method that would be appreciated.