check out the DIY projects and ideas section of the forum.
also it depends on the ideal stand you want to build. if it's a
simple skeleton stand (frame only, no cabinetry) just measure
how high you want the first/bottom tier to be followed by the 2nd
tier. remember to leave a few inches from the top of the tank
on the first/bottom tier to the bottom of the 2nd tier so you have
room to work with.