Sorry Gene, I'm no help. I have one, but don't use it.

K Barrett

"Gene Schurg" wrote in message
...
Recently, I visited a hydroponic supply brick and mortar store to look
at TDS meters. They had some from the low end to $150+. Some needed
calibration (the cheaper ones) and some of the more expensive ones were
self calibrating.

What are others using and would you recommend it to another grower?

Good Growing,
Gene