pea puffer tank

Hello! I am interested in setting up a species tank for pea puffers, but I need to know some stuff! Can I keep just one? What size tank should I get? What do they eat? Can they have any other tank mates? Thank you!

My nicest looking large female shrimp. I do have others with similar or better coloring, but they tend to be smaller. She was born in my tank going on two years ago. Most of my large shrimp died when I had a tank crash. She is currently my largest red cherry shrimp as well. I only just recently...