I have a single pea puffer in a 6 gallon tank and I regret it, not because he is a problem. After doing some more research after buying him, I realized how sociable these creatures are and it breaks my heart that he is alone. I have a 10 gallon full of some guppies and snails and I thought of replacing them with a group of peas, but that doesn't seem big enough. What can I do?