two days ago i went and bought a floating 3 way breeder from petsmart and got 2 males and 4 female guppys. 3 of the females died today and the other are doing just fine, they are in my display tank any ideas why they may have died? i did attach the breeder to the side of the tank so it wouldnt go get stuck to my filter, but i doubt that had anything to do with it.