? about AP filtration setup

jacksonpt

Active Member
In my first run through this hobby I had a more "traditional" setup - a main display tank with an overflow that fed a sump. One very nice thing about that setup was that the water level in my display tank never changed, rather the level in the sump went up and down with topoffs and evaporation.
So as I sit here and look at my Aquapod 12, it seems to have a similar setup - with an overflow for the first chamber, with the other 3 chambers acting as sump with baffles. So why is it that the water level in the "display" portion of the tank changes? Because of the overflow, should that water level stay the same, but the water level in the "sump chambers" go up and down?
 
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