I currently have a 7 gallon tank with 1 male betta in it. I am hoping to add 1 albino african dwarf frog(if i can find one) and 1 normal african dwarf frog and 3 ghost shrimp. Will this overstock the tank? Are the mortality rates higher on the albino DAF or are they just as hardy as the normal DAF? Also any special requirements that I should know about?