Probably lots (bacteria, pests, parasites, etc), but I've never had any issues. (although, seeing the occasional pond bug/worm/isopod doesn't bother me if it doesn't seem to be harming anything or throwing the tank off-balance.) Int he past I've had minor planaria outbreaks, detritus worms (which I actually like, since they eat detritus and actually create more live food in the tank), scuds (which I like for the same reason as the detritus worms) and have seen the occasional dragonfly larvae-- large and easy to spot, but very predatory if slipped in with your fry). Nothing that would outweigh the benefits of happy fish and plentiful fry. I might be more careful with anything overly rare or overly expensive. Most commercial live food is grown in farm ponds (or harvested in the wild) with similar potentials (unless you're using lab-grade cultures), so it's probably not much of a new risk. I use my own live food (mostly daphnia and insect larvae) that grows in our yard ponds and rain barrels, but the original critter cultures were all pulled from local ponds. Cliff > I live near Totem Lake, I should look there. Are there any concerns with > feeding wild-caught food? > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member > _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member