In the process of putting in pond

[fishykisses]

I've just put in a pond - well this has been a 2 year project
so now it's in but i'm have a heck of a problem putting in a waterfall.
Does anyone know of a website or information on how to do a simple waterfall?
Also any feedback or idea's on my pond, please feel free.
I've just gotten indian paintbrush flagstone for around the pond and i'm getting 7mm green gravel for the next layer behind the flagstone and then the indian paintbush again up to the fence...but that's just for the front of the pond, the back will be waterfall and plants.
Here's the pic

once it's all done i'll be adding a couple turtles - i had an 11 year old turtle out there but she was stolen this year.
So we'll be starting fresh with a couple small ones (turtles) and some goldfish...i'm not sure if the pond is big enough for a koi - i got the pond form cheap cause it was mis-marked so i don't know how many gallons it is. If anyone can tell approximately by the pic i'd love to know.
Thanks all!

 

[bribones]

not really a good picture to be going off lol ,the area on the left of the picture looks to be the best place,use some pond liner to create the water fall making sure its overhanging the pond and silicone it into place,shape it on the underside with sand/soil or rocks and use rocks or paving on top of the liner to direct the water flow ,just use your imagination ,best do it while the pump is running so you can change the direction of the water until its how you like it as an alternative you can buy preformed types


http/www.rlrouse.com/build-a-waterfall.html

http/www.tetra-fish.com/pond/buildwaterfall.aspx

http/www.watergardenshop.co.uk/mwg/dept....&dept%5Fid=3690

just a few examples but you can look on google for local outlets