Water Sculpture

Home - Taking a break in the sun room - Look out the window - Think the pond needs a bit of sprucing up - Oo why dont i make a sculpture! One thought lead to another and this is what i came up with :

Ceramic dishes that tilt onto the one below it when full enough of water. The water ends up in the pond.

I would like to find a way that allows me to take the water from the pond up to the first dish again with out the use of electricity. Was thinking Archimedes' Screw could be a possible solution. But, it is quite a beefy piece of engineering. 

So my thought was to cast a 4ft balloon to get the correct gradient of curvature to the dish.

But then I learned about Sledging Plaster

So i made a mould by sledging plaster instead of casting a balloon. 

Packed out with clay (could have done more of this before casting, live and learn...

18kg of Plaster used to make this.

Then used Claypitts clay to make the first dish: 

However now it is drying the clay is too heavy so big cracks are forming where gravity is pulling it apart. So i will need to take a cast to make the inverse of the current mould.