Dart Den

I am ready for the next step....When you put the bottom piece of plexiglass in the Viv ( to keep the water/soil in) is it supposed to go on the inside of the rim? Do you then seal up the rim of the aquarium after this or before this?

if your talking about building a vert go to
http://thechocohut.com/
>enter
>building vivariums
>How to make a Vertical tank (10 and 20 gallons)
and read the intructions