Show your Four lined pims!-)

[Fishy-Botany]

They aren't skittish ime. They get to about 1' TL, I'd say 18" is minimum width for them, don't know how wide your tank is

I have a 75 gallon I still planning things out for.

 

[moe214]

I have a 75 gallon I still planning things out for.

The whisker thing came about with I believe Achara cats who become skittish when their whiskers touch anything at the same time such as both front and back of the tank