my bta is still alive.. it's in a quarantine tank along with the rest of my fish, minus the goby I couldn't catch. the parasite is known as cirolanid isopods.. they are nasty bugs that feed on fish. its a very rare problem that I have unfortunately had the opportunity to deal with. I'm starving them out and also catching as many as I can in a 2-liter bottle trap. nothing I can do but wait it out. I did however try what you said before I had taken out the livestock and fed the shrimp.. he left the nem alone but wouldnt clean the fish! i almost took him out and made him into a shrimp tempura.. lol