how could the influent chamber take more water than the pump puts out?
wont it fill up at the same rate as the pump?
if it took more the sump would overflow.
the fuge and skimmer sections are always at the same level due to the baffles and that is where the dt drains so the only place the water will go down is the pump section.
obviously the dt and all the sump evaporates water but it is the return section that lowers.