Thanks all, this sounds like good stuff - I've never seen anyone comment on DO meters for the average pondmeister like myself [although threads excape my search efforts regularly] and it sounds as if one can get away with a $200 investment. We should have a "recommended prodcuts" page for the average pondmeister...sounds like th YSI is everyone's choice for quality.
Now, will anyone think of a plausible version of the truth to provide the wife to explain the $225 charge on my CC? I will provide a free DO test at your body of water for the most convincing story.
TJ