Well friends, I seem to have another slight disaster on my hands...
Specifically, some kind of fungal infection. It seems to be in the gonophore and eye of one leech, and just the gonophore in another.
I've quarantined all the leeches from that tank, pulled out all the big rocks and plants, and removed all the water. I work all day tomorrow, but I should be able to start disinfecting the tank and accessories on Sunday. I'll keep all the leeches quarantined for at least a week, longer for the visibly infected.
One of the healthy leeches enjoying the plants in his container. Gotta stay positive! :)
I am looking for antifungal medications for invertebrates/fish, but there isn't really any studies on the effects on leeches that I have been able to find. If anyone on here has any experience with this, please let me know!!