In message lgate.org,
Lawrence Zarb writes
I need some stainless steel rods to act as water level sensor probes for
my fishtank, does anyone know where I can get hold of some?


Try a local radio dealer that sells "walkie talkie" type radios, most of
the whip aerials are stainless and there are always off cuts from when
they are cut/tuned to length. If you want a few bits drop me a line and
I'll put some in the post to you. What sort of voltage is going to be
between the probes? I have no idea what the fish could sense, but it may
be a consideration.
--
Bill