Do all aerate or circulate their make-up water reservoir. I know that stagnant water often stinks (smells bad) and I do aerate/circulate, but wanted to know if there's any scientific reason for doing so.
Well, if you don't aerate or circulate it, it may accumulate CO2 and have a depressed pH. IF you test beforehand and see this, then add buffer, when the water is added to the tank, the pH will spike.