tiger knife?

[blackghostknife]

how big exactly do tiger knives get. I want to put one in my ray pond

 

[Loves severums]

Size: Museum records state an adult size of 40cm/16" for G. tigre, but this adult was probably more like 45cm/18".

http://www.practicalfishkeeping.co.uk/content.php?sid=2353

 

[blackghostknife]

thank you