Oops, I meant feeders as pets. Sorry I didn't make that more clear. I like rosy reds which are always sold as feeders and ghost shrimp seem to be labeled feeders as well. And I just like feeder guppies. The feeder tanks all have healthy looking fish, never see any dead, so I'm hoping they don't have any illnesses but I suppose they could've got parasites from wherever the pet shop gets them from.
I plan on quarantining for at least 4 weeks. Just not sure if I'll be able to tell they have parasites. Oh, I hadn't researched much about the garlic, I assumed it must kill them. So what happens if they already have parasites and you feed them garlic soaked food? Do they detach themselves from the intestinal lining, get pooped out by the fish and then die if they can't find another host?