I have a male Dinosaur Bichir naked Valentino who is about a year old. He is in a 75 gallon tank. He was in the tank with a female bichir who was bullied to death by a very aggressive rainbow shark, who has since been re-homed. I was very sad to lose her and should have moved him out of the tank months ago. They seem to really get along well and were very friendly with one another. I’m wondering if I should get him another bichir to hang out with or will he be ok in the 75 gallon alone? He seems fine. He’s a very active bichir who swims almost all the time. Loves to play in the bubbles. Very good appetite also. What do all suggest?