Paddletail newt - what fish can be kept with them?

I had one years ago and loved her. She was playful and fun to watch. I decided to introduce some fish to her space to liven it up and it ended up making her sick. I removed the fish and cleaned everything for her, but it was already too late. She slowly died over the course of a month. I felt terrible. I have wanted to get another one since losing her. I see so many people keep them with fish but I am not sure it is a good idea.