Last June I sunk a plastic half barrel into the ground
By July the water had cleared and I added a waterlily. (Foolhardy perhaps as it wasn't a dwarf waterlily)
The neighbourhood rabbit ate the first few leaves, but now the pond looks like this:
There is a balance between the 6 plants (including the floating oxygenator) which I suspect will be harder to maintain in future years. Still all would be forgiven if the lily were to produce a flower next year!