It may also sneak in with the brine shrimp eggs. The population of it definitely increases based on the availability of micro-food for it, such as baby brine shrimp. Ours has steadily decreased as we switch from BBS to larger Daphnia and mosquito larvae, but seems to come back once we go back to larger feedings of BBS. I remember Soares' tanks were just covered in them when we visited; he feeds BBS almost exclusively. - Erik On Fri, 11 Sep 1998, Matthew Bourne wrote: > Hmmm I guess I'm fortunate to have never encountered it yet. I suppose > the most common method of contamination is from introduced stock? > > Cheers > Matt --- Erik D. Olson erik at thekrib.com (fails? try eriko at wrq.com) ------------------------------------------------------------------------- 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"!