all my fish i have had in the past even the ones that were sickly when i got them have become healthy and super happy until they ate/eat each other but i think it is becuase i have such a huge biological filter my tank is well oxegenated and has plenty of stumps,driftwood,plants to hide in plus my eco aqualizer and my powerful uv steralizer and my very effective powerful eheim pro 2 filter
