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That gets into fluid dynamics and pressures which our scientific community would love. I would love talking about Pascal's law as well. I wonder if varying degrees of tank circulation would impart some also varying degree of localized pressure change on the substrate (being it's a point of restriction) and as a result, maybe a change in osmotic flow (capillary action?).I don't disagree at all. As for the benthic or anaerobic processing (same with a DSB) and I am not sure that "flow" in terms of water flow is what would be the driver. I think osmotic flow, as well as bacterial boundaries and migration would come into play (thus why those zone exist in the first place).
How important? I can't answer that.






