Hi, It has been a few years since I priced and looked at water quality instrumentation. However, I know find myself with a 50 pond aquaculture facility. I am planning a study that will involve 12, 1/4-acre ponds. I would really like to set up continuous water quality monitoring of "at least" standard water quality measures (e.g. DO, pH, alkalinity, conuctiviy, temperature, and if possible nitrate, nitrite, ammonia). YSI used to make a unit that did most of this, and it could be set up to record and download to a computer. Howeve, the models have since changed and I am very interested in hearing people's exprience with different models, and recommendations or private (off listserv) discussion of what options might fill the needs within our budget.
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