So I have had aquarium fish for years. I know I need a new tank, but I keep it clean and change the filters, etc, and generally my fish live a long time...many years. It's a 55 gallon tank and I have had four goldfish and one Dojo loach for the past several years. I've been wanting to get a 75 gallon tank so that i could have two loaches, but just haven't had a chance to In April, my Dojo loach who was about 5 years old, got a lump above his eye. It eventually almost competely blocked his vision on that side. In July, he started developing a lump above his other eye. I knew I would probably eventually have to euthanize him when he could no longer see; however, he died a few days ago. On top of that, my goldfish all also developed lumps. I researched this and found that it is a common virus in fish. I have never had it before here in all the years I've had fish. It is apparently especially common in loaches. Two more of my goldfish have died. Of the two remaining, one apparently recovered as her lumps have disappeared. The second has a few small lumps, but they don't seem to bother him. I read that this virus is not usually deadly, so idk.....has anyone else experienced this? I also read that there's nothing that will treat it. i feel like i can't get any more fish. Even if I got a new tank, I'd still have to transfer some of the water and other components from the old tank, so I think I'd be contaminating the new tank.