Please Help Asap

IMHO, you should try bleaching everything and use an anit-chlorine agent such as AmQuel or other good Anti-Chlorine agents, then rinse extremely well with water. This should be done to everything that was possibly exposed to the parasite and the bleach should kill everything taking your equipment and tank back to an uncycled status. That would be the best method IMO. Hope this helps!
 
Went back and consulted the Fishlopaedia again. He mentions better husbandry for most ailments and does for this one, keeping the tank clean, etc.

For specific sources he mentions that livebearers seem especially susceptible and that copepods (small water bugs like daphnia) are an important step in the worms life-cycle. They can go a few generations in a tank based on fish eating wast material or infected corpses but copepods, possibly introduced as live food, are probably at the root of it somewhere along the line. A thorough cleaning seems in order but these guys need a live host, I wouldn't worry about eggs lying dormant in a crevice (assuming that is, that nematodes were the problem).

Sorry to hear about your friends tank :( .
 
my original hypothesis was taht the bug came from the cheap feeder fish that were sometimes given to the gar as a snack...I think that in the future, he won't be buying any crappy feeders
 
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