On Thu, 2 Oct 2003 09:28:23 UTC, "Jimmy" wrote:

...

Are there any meters that one can buy other than a PH meter?

Total Dissolved Solids. (The name is misleading, since it measures total
*ionic* dissolved solids, but what the heck.) A pocket-sized meter that
measures electrical conductivity. Very nice to know whether how much
osmotic shock your critters will experience in moving from one environment
to another.

In the marine-tank biz, people are often concerned with redox potential;
many lab-grade pH meters are equipped to read this, using a special
electrode for it.


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