Malawi rock face building - help!

"SkyCatcher" wrote in message
...
Hi,

I hope someone can help me with some advice!

I am building a rock wall in a 1.4 m (4 1/2 ft) tall aquarium which is
only
660cm (2 1/2 ft wide) wide but is 1.65m (5 1/2 ft) long. The wall is to
go
against the 1.4 m end (width about 600cm).

I started to mock this up against a wall and I have found using my
original
idea of Ocean rock it is just going to be too heavy & unstable (even if
I
silicon all the bits). I have put plastic fruit crates against the wall
at
the bootom & along the underneath of the structure to reduce the amount
of
rock but I don';t think will solve my problem.

My next thought is to use an alternative to ocean rock fro the parts of
the
structure that won't be seen. I was thinking of lava rock - would that
be
much lighter?

Anybody have any other suggestions?

Thanks,

Sky

ps the arangement side-on would be like this belwo where x - ocean rock
&
o - is something lighter an easier to work with.

|x
|x
|ox
|ox
|oox
|oox
|ooox
|ooooox
|oooooox
|oooooooxxx
---------------------------------------------


Styrofoam, either as back material or as the entire structure. This one
is mine (to give you an idea of it's processing).
http://www.2cah.com/netmax/diy_proje...ulptures.shtml

These are from other sites.
http://cichlidinspiration.net3services.com/show_articles.asp?category='Constructions%20-%20Background'
http://www.malawicichlidhomepage.com...ackground.html
http://www.malawicichlidhomepage.com...o/invent1.html
http://www.goddijn.com/aquarium/index.htm
http://www.thekrib.com/TankHardware/janne.html
http://www.african.uklinux.net/phpBB...26&forum=8&153
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