More photos
We are moving forward with the Food Web model system. We have started construction on the barn's
water. It is a 7,000 gallon rain catchment system. We've been experimenting with liner-tanks for large capacity water storage, and this one is coming out great.
The basic concept with these tanks is to make a support structure to hold a liner (animal safe or potable, depending on your needs). The structure has to be able to hold the liner in place, and resist the pressure of the water, especially at the base. The trick is to avoid making the tank very tall. A 4ft tall tank has only 1.8 psi at the base, no matter how wide the tank is. 1.8psi is not a lot of pressure, and can be held with a very basic frame, like wire mesh, plywood, or sheet metal.
In this version, we used wire mesh.
Here's some more details about the tank:
http://www.velacreations.com/blog/item/280-barn-tank.html