Hi..
There are 25 or so species of snakehead, occurring across Asia and tropical Africa channa gachua. This species is a good choice for anyone just starting to keep Snakeheads. Channa gachua has been bred repeatedly in aquariums pH of 6.0-8.0 preferred, temperature no more than 25*C A pair will need a minimum tank size of 90x37x45cm/36x15x18" Ensure the tank has a tight fitting lid as C. gachua are well known for jumping
hope this helps