Can you please post photos of her and her poop?
Can you explain what she expelled, was it eggshell and yolk/whites or just a piece of hard shell?
I agree, I'd get some Calcium into her. The 600mg tablet is fine. Just open her beak, pop in the pill and let her swallow.
Do keep encouraging her to stay hydrated. Electrolytes can be added to her water, but she needs plain water throughout the day too. Let her eat, if she's not that interested, then give her bits of egg, small pieces of fruit or melon, something to entice her.
IF you only got eggshell out and she was leaking yolk or whites, then I'd get her on an oral antibiotic. Amoxicillin is a good choice. Sometimes you can find Fish Antibiotic at TSC depending on where you live, if not, you can order it online.
Let her move about as much as she's willing.