Re: Grounding Electrode

• To: Aquatic-Plants at actwin_com
• Subject: Re: Grounding Electrode
• From: eis at alto1_altonet.com (Paul Nicholson)
• Date: Mon, 13 May 1996 08:44:51 -0700

Andrew Hamilton <andrewha at tafe_sa.edu.au> wrote:

> Finally I
> decided to try earthing out the water and BINGO, all interference was gone.
> I can now switch anything on or off without making any difference to the Ph
> probes' reading.

> The question I have now is what metal is safe to use in an aquarium?

A good choice would be a graphite rod. The center post out of a "D" cell
battery might work OK (assuming that it can be cleansed of the battery
electrolyte). I don't know if graphite rods are still used in high
intensity carbon arc lamps. Graphite is often used as an electrode in
chemical processes, perhaps it is available industrially.

Paul

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