breeding fish

hey every one I have pair German blue rams that should be breeding soon dowe anyone have any tips or know of any species of stress that are good to breed

i will presume that when you typed stress you ment fish?if that is the case then you will have to be more spicific as what YOU are looking for in a fish.or is there a specific perameter you have locked in that you want to use as breeding enviroment?maybe its just to earn some credit/cash from a local fish store?

they're is no specifications on what type I just was wondering a good species preferably a species of tetras

well as far as tetras go you usualy want to get your water softer with a lower PH to simulate there natural enviroment.but this can depend on the type of tetra.since you said you have no preferance i personaly like the look of the jelly bean, rollofi ,tetra and you dont see them as often as you should so maybe try them out. here is a article that gets to the point.
http://www.fishchannel.com/freshwater-aquariums/fish-breeding/jelly-bean-tetra.aspx