if you can take him out of the tank for a couple of hours then reintroduce him can sometimes work
he will be the same with any other new inhabitants, territorial issue - doesn't like new players on his patch
best to have a control set up before you start assuming it is a frog parasite
get frog faeces and smear on glass under microscope
they may just be coming out to feed on jelly etc
most parasitic nematodes need an intermediary host
http://www.jstor.org/stable/3221896
http://news.nationalgeographic.com/news ... t-mutants/
http://www.colorado.edu/eeb/facultysite ... #trematode
http://www.parasitesandvectors.com/content/5/1/208
this one done in nz
http://nzetc.victoria.ac.nz/tm/scholarl ... dy-d3.html