Hi, Take a look at: http://www.thekrib.com/Diseases/nematodes.html#3 This is the treatment that I used to treat nematodes. There is a risk that your fish are carrying them if housed with fish were carrying them. I believe they get into the fish if the ingest eggs or young of the worms. They will not kill fish quickly but can in the long term as the gut gets eaten into. Good luck, Ken. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!