I'm starting to see signs of internal parasites in my EBJD's. This isn't surprising as I know their immune systems are really weak at a young age, but I do have them all separated in another tank. My real question is how are the internal parasites transferred from fish to fish? Are the parasites capable of moving from host to host in the water or are they transferred in the poop of a fish? I believe I have taken out all of the infected fish but want to make sure I can keep the other fish in the tank and keep them healthy, as the non EBJD fish appear to be fine for now, which are all plecos.