We want to set observations on hydroponic system. We have growing chambers and different sources of nutrients. Some of the data collected includes CO2, temps, humidity, EC, pH, etc. What we would like to do is add meta data. We tried via virtual data sources and question if there is a better way as adding a tag by chamber seems cumbersome.

I was thinking of a JSON store. What makes it unique is the growing chamber + nutrient and the plant type.

Here is a usage scenario
At time t, add an observation e.g. for growing chamber X, nutrient tank Y, plant type Z, such as the characteristics of the plants, and other types of observations that could influence the growth. In the future, the data collected could be analyzed in the context of these observations.

Is the JSON route appropriate?
peter