ok im building my first

[grrrit]

and i have the concept of the walls and backround down, but i'd really like to have a waterfall and river through the bottom but dont know how to separate it from the land efficiently. and i would absolutely love to make this as self sustaining as possible. any help would be greatly appreciated =] thanks guys

[CLennerton]

from what I have see with others is using a filter/pump and build a waterfall using eggcrate and greatstuff foam.....for the river I would imagine you would use a pump and have it go through your background to the desired mouth of the river....rocks and silicone would help separating the river bed and the ground....or carve a river out of gs

[grrrit]

Thanks, I've used that great stuff before but didn't think I could with a viv.

[CLennerton]

I have never done it before as I am still researching for my first build, but I have seen many people do it with GS...shouldn't be a problem