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I am working on a final project in a course, and am having some difficulty interpreting the output from GWB. My input files are below. My question boils down to how geochemist workbench deals with the "time" component on the basis species page, and the "reactants times" on the reactants page when dealing with a flow-through model. I have found the residence time of a conservative tracer in my column, which is ~164 minutes. Over the course of my column experiments, which typically last ~5 days, I react ~44 pore volumes. To incorporate this information into the model, I have used both 164 minutes (residence time) and 120 hours (average experiment time). On the reactants page, I said to react 44 times. But I don't know what GWB is reacting in that case. If someone would be able to advise me on the best way to incorporate all the known data into my system, I'd appreciate any help. In the end, I want to run a series of these to see how long it takes to dissolve 15.59 cm^3 or 23 grams of silicate glass. Thanks, MC SiDiss1.rea