Hi,
I'm new to the forum. Looking around for info as well because I'm in the planning stages of getting some leo's. From my vast research I have read that:
1/ You should allow at the very least a 10 gallon tank per gecko you plan to house
2/ The tank should have a metal grill top so that you can safely use a night bulb (for better viewing at night) and potentially a day bulb (not heat) to help with their day/night cycle if the room you plan to keep them in is quite dark.
3/ The tank should have a minimum depth and height of 1 foot (12 inches)
I plan to get a 20 gallon long tank (which means its more rectangular (more floor space than height) rather than square (less floor space, more height)
Is the enclosure your getting completely encased with only glass on top? That's what the turtle tables I have seen look like.
Obviously I'm not an experienced owner of a leo gecko so if anything I have said is misleading I hope someone will not refrain from telling me

... I doubt it though as I have read a lot of info.
Hope the above helps.. and enjoy the new gecko
Ret