I know, I feel AWFUL for them! I have used 2 treatments of some medicine called Trifon. The day after I first put it in, the leeches were all gone except for just a few here and there near the tail of the SNE. So, a week later I treated it again (you can add it weekly). Tomorrow it will be another week, so I will have treated it three times. I'm just wondering if I'm correct in my assessment of leeches because although maybe it does take a few times of treating the tank, if it's something else, I'd like to fix it.
Neither eel was stressed at all after the treatments. As a matter of fact, they were both very happy afterwards since they had no leeches on them. Also, both eels are eating fine.