my tank i have just tetras and danios so i cant say, but my dads tank he has mollies, guppys, 1pr swords, and the guppies bred first the mollies he brought pregnant but all survived and werent eaten by anything even the small tetras he has now didnt eat the 2 he recently had born, the tetras are gold/orange with 2 black stripes similar to widows but orange and smaller,