Here are plots of the routine monitoring data that is collected from the microcosms - temperature, pH, electrical conductivity (EC), and oxidation reduction potential (ORP) - from the beginning of data collection August 17 through September 30. We also make readings of dissolved oxygen (DO) and todal dissolved solids (TDS). The EC has trended upward, due to evaporation and possibly dissolution of salts from the sediments. The pH rose early on and has leveled out at an average value of 8.55. Temperature is stable around 22 degrees C. The ORP is variable. I hypothesize that ORP is correlated with water level in the tank and the subsequent ammount of oxygenation. I'll report back soon. The data from different sampling locations in the microcosm tracked each other well, and indication of good mixedness. To look at the individual data points, you can download the raw data.
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