My return line is setup to run a manifold, and it splits off right away as it exits my sump. Where should I place my flow sensor to get a good idea of the flow leaving my sump? Not sure on the physics here, but if I had two of them, and placed one on each end of the split, could I add those together to get the total flow into the tank? If I use just one, could I put it in the end with the manifold (which will likely be the flower of the two lines) and multiply that number by two to get a rough, lowball estimate?
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