Thank you for responding.
Their cage (actually was 2 cages combined) has 4 sleeping pouches
... 2 in each cage.
Right now the original aggressive female acts as though the other female isn't there, but the originally unaggressive female has turned seemingly aggressive toward the other when she sees her. The tables have turned. She is absolutely fine with the neutered male, but goes after the female. Both girls get along well with the male and he with both of them.
I cleaned both cages completely this weekend. They are all clear on their fecals. I will do the bath tub get together and see how that goes. That's how I originally introduced all three.
Thank you again for responding.