in one of the magazines,, they showed the 'inside' of a tall waterfall was
built using concrete blocks,, then you put liner ,dirt & cover rocks over
that.

the space up through the center of the blocks was used for the water hoses
etc.


"chaddc94" wrote in message
om...
I am building a 7 foot tale waterfall but I can not figure out what
would be best to use to build it.