Did Josh tell you that this female was new to him when he threw her in? If so, did you not feel due to her being new to him that you should not be introducing males to her until you were certain she was well?

Also, after she had the runny stool and you removed the pastel, why didn't you get her tested for parasites before putting the pin with her, considering runny stools aren't normal?

Just trying to understand the big picture.