I have a school of Elephantnose fish that I have had for about two months, that I want to treat for parasites. I have already treated them for hex/spin using epsom salt soaked food, which may have helped, but I still had two that wasted away, similar to how loaches do sometimes. I want to treat the rest with something more, because there are a couple that still look sort of skinny, even though other ones are extremely fat, and they are eating well and have no competition for food. But I have hesitated so far because I know ENs can be sensitive to meds, and I don't really know what would be safe for them. I have PraziPro, API General Cure, and Levamisole. Which one would be best to start with, and are any of them not safe for mormyrids? Also, right now they are in a tank that has a colony of cherry shrimp, so I would have to wait to treat if any of these affect invertebrates.