Liveaquaria deworms fish using "frozen food soaked in praziquantel, metronidazole, and piperazine."
http://www.liveaquaria.com/general/general.cfm?general_pagesid=425
Feed them some medicated food. Ryan if yours is still eating would you try it?! The prazi hasn't seem to do the trick because most of the people with problems have already used prazi on the fish. I would use food medicated with metronidazole. IMO its worth a shot... There are some foods out there by jungle I believe that are already medicated but you can make your own too.
I run ozone with no issues to any of my fish.
Kevin-How are you running the ozone? I run mine through my skimmer and attach a bag of carbon to the outlet of the skimmer and a bag of carbon on the air outlets on the top of the collection cup to catch any extra ozone. Sometimes if excess ozone is leaking into the system, your fish will have labored breathing, erratic swimming, and it can also indirectly lead to the ragged looking fins and in some cases HLLE.
Jason, I think you meant to ask Ryan about how he runs the ozone. I know my lfs runs the ozone through the skimmer and pretty sure he runs carbon as well.
Do you think the GF is more susceptible to the ozone than the other fish with swim problem and ragged fins where the other fish doesn't exhibit any sign? I could see the above issues but isolated to just the GF is a bit strange. My first impression of Ryan's GF picture appeared to have a bulge (but felt inappropriate calling out other member's fish and not knowing anything about their fish or system at the time) and mine is slightly bigger than that. The strange thing is that bulge developed in matter of days and the GF was eating and swimming normal just prior to the bulge.
Kevin
Off the wall thought here, but I'm kind of thinking in the other direction... Most of the fish mentioned have been treated with praziquantinel. Maybe something about this medicine harms them internally?
Or maybe something about captive diet compared to wild - something either causing swelling of internal organs such as liver (as jeremy mentioned), or something that they digest funny causing gas?
I remember Recty has this issue with a scribbled. If I remember correctly, he cut it open after it died and the bulge appeared to be gas.
I wonder what they use as a binding agent and if they use anything to assist in getting the fish to actually eat the food with all those meds in it.....I have read that they are not particularly appealing to the fish's palate.