Black Ghost Knife Pair Tank Advice

[amazontank]

Black Ghost Knife Pair Breeding Tank Advice...
The male is 13" and the female is 11"...
Any advice would be appreciated other than get a bigger tank, which I am working on...

For now i have 2 choices.
55 gallon 48x12.5x20
55 gallon 36x15x24

Not sure if they would want the height or the length?

 

[Thekid]

I'd go with width personally it'd be tight for a 13" fish in a 12" tank

 

[Dangerman]

Black Ghost Knife Pair Breeding Tank Advice...
The male is 13" and the female is 11"...
Any advice would be appreciated other than get a bigger tank, which I am working on...

For now i have 2 choices.
55 gallon 48x12.5x20
55 gallon 36x15x24

Not sure if they would want the height or the length?

increase length, knife fish like the bottom more, also but in a bunch of 'caves', by the way, where do you get black ghosts?

 

[amazontank]

I ended up going with the 240 glass tank so they are gonna be styling!