its not a good situation.
through good care I have got the swollen eye problem back to normal with the original infected fish, however two of the 5 fish are not eating normally.
I have seen the stringy feces like the pic I posted in each of these fish at one time or another so I believe they are all infected.
its my own fault because I saw stringy feces in the tank way back when they were small, but I didn't think much of it at the time because of how well they were eating and growing...
problem is, these sorts of infections are rare in cyprinids and characins, (south american cichlids are more prone to this sort of stuff for some reason)
and internal infections like this are very difficult to treat.
meds added to the water (in powder or liquid form) usually do nothing.
medicated food can help but I can't get these fish to eat the food I got for them. they spit it out.
I love my setup, but man, have I had some bad luck fishwise. but thats life.
I have a feeling I may have to start this tank over yet again.. you now what happens I guess..
the sev in the 20g is doing very well though..thats at least some good news