It is a custom built tank to fit my wall. The lights are also mounted into the wall so the length is irrelevant.What's 61/2??? 6 1/2"? That'd be the closest to a 20 gallon tank. Where the heck did you get this kinda tank?
T5s won't fit a 42" tank exactly. It'll either be too long or too short.
Yes it is true because the depth is quite narrow.The tank can be seen on both sides and one side is a mirror image of the other side. That is why the arrangement of the plants has to be seen as length wise. the 3D effect will be difficult to arrange.I intend to just add shrimps only to the tank.i've seen these tanks....they look like picture frames. pretty neat, but hard to cram plants in and leave room for fish!