i tried the waterfall idea and it was a complete failure. i think mainly because i didn't plan well enough and didn't know proper procedures for curing whatnot. not saying it cant be done, because some guys on here have done fantastic jobs on them. i would say if your passionate enough about it and you think you can be patient enough, go for it.

plan it out on paper..steps, materials, sizes. congrats on the new tank and good luck