I understand that’s how you feel. but to me the tank isn’t cramped for them at all. These aren’t fish that swim around in the water column all day. They spend most of their time in their burrows or suspended stationary whilst they wait for something to present itself as food.
Also your choice of fish to compare them to implies they are destined to battle until one is dead. This is not fair, these fish are paired and apart from during an annual water change have never fought. They normally spend all day lying on top of one another. a few hours after the water change they were back to normal, spending time together with no aggression. That’s normal snakehead behaviour.
https://www.practicalfishkeeping.co...icles/Your tanks: Paul Jones, 'snake' charmer
Also your choice of fish to compare them to implies they are destined to battle until one is dead. This is not fair, these fish are paired and apart from during an annual water change have never fought. They normally spend all day lying on top of one another. a few hours after the water change they were back to normal, spending time together with no aggression. That’s normal snakehead behaviour.
https://www.practicalfishkeeping.co...icles/Your tanks: Paul Jones, 'snake' charmer