Do Bichirs have to breathe air like lungfish? and do i need to leave a few inches of space between the waterline and top of the tank?
or can i fully fill the tank? it's one of those where once filled to the top, there's no space for air!! fully covered acrylic tank
or can i fully fill the tank? it's one of those where once filled to the top, there's no space for air!! fully covered acrylic tank