i have a tetra tank with a betta fish in it now some one told me that you cant put any guppys with a betta because it will kill them and at almost three dollars for a guppy i wasnt going to try but i came home one day to find out my husband had been givin a bunch of free guppys and put them in the tank (not knowing of course) and they have been getting along just great (about 2 months)the betta leaves the guppys alone and vise versa so can any one tell me if it was true anout the bettas and guppys not allowed together? and if anyone wants to know how he put them in if they want to try with their betta fish i would be glad to let them know. and of course he has been told not to add anymore fish into the tanks we have be fore letting me know of the fish he is wanting to put in them cuz it may not work out for the better next time