Ok, well the company my dad works for had some little blue crayfish, he said lobsters but I think he meant crayfish. Apparently someone made a mistake and put a pair together. Now they have tons of babies. My dad said I can have some. So, I wondering, should I put them in the 45gallon with a cory cat, 3 phantom tetras, a rosy barb, a pair of swordtails, and a plattii or in my 1.5 gallon with my betta and pygmy cat or should I set up my empty 10gallon?