I have 3 Phantom tetra soon to be 6, a Ruby Shark, 3 snails and 4 ghost shrimp ( you can never have enough ghost shrimp ) All in a 20 gallon. And I want to add more. It just look so empty. I plan on upgrading later but for now all my fish are small. I think my shark is about 3in. What should I add after I get my Phantoms...maybe some small tetras umm...I don't know what to add. Or maybe I have enough??? I hope not. I mean How do you know enough is enough
