On 31 Mar, 06:24, wrote:
On Mar 31, 2:54 am, Matty F wrote:

On Mar 31, 12:15 pm, Martin Pentreath
wrote:

My idea on building one is to build a steel framed box about 1m high
with a random taper ff each side.
Then to cover this with chicken wire and bend to shape. Once happy, I
can cover with some mortar and rocks.

Why not get a large block of polystyrene foam? Lighter and cheaper
than steel, and it won't go rusty. Hack into the shape you want and
cover with chicken wire and cement.

Martin: Thanks - I had thought of that but thought here might be a
better option. I'll watch that one as well..
Matt: Nice idea. Thanks. Much easier to form and if I don't like the
shape it's easier / cheaper to start again

Oops hit the wrong button !

The polystyrene block might be a good idea bu the cement coating idea
is a no-no and I don't know what to offer as an alternative other than
fibre glass.. The cement will leach into the water and add minerals
which algae will thrive on. I suppose it is possible to seal the
cement, but a 1 m high wall of cement will look pretty unnatural and I
suspect if it is sealed nothing will grow on it to blend it in.

Rob