HI,
Really sorry to hear of your fish losses here Shane.
Some general info for you on capillaria. If you are battling this nematode... Levamisole should work....but a med that will is Fendendazole(Panacur). You can find it in a flake format or you can make your own food with it...Its added to the food...NEVER to the water.
Theres some miss-conceptions here on capillaria I need to clear up..
If you have capillaria worms... they infect fish by being ingested as eggs in most cases, but these eggs are shed into the water, and can take weeks to actually develop to the point that they can infect the fish, so in many cases, wiping the tanks well, lots of water changes and removing organic matter will go a long ways to preventing infection once you have dealt with the adults in the fish.
I am not sure that you are seeing Capillaria. Theres an article here..
http://www.simplydiscus.com/library/...ematodes.shtml
that you should read...most people do not see capillaria worms... they may see the barrel shaped eggs.
Identifying worms is actually not as easy as many might think.. Unless you have a really good understanding of parasitology, its very hard. I know my way around a microscope well and I feel confident that I may be able to identify "worms" in general, maybe, so not trying to convince you otherwise.
Really the best course of action if you are dealing with something elusive and chronic, is to get a fish to lab for a positive ID...
Hth,
al