ok now i have a question about sumps.....ok i understand that the pump sits in the clean water side to pump it back into the tank.....but how does the water get into the sump?....is the inlet into the sump suppose to be below water level so that the pump will cause suction and draw it through?? or is it siphon, but then i would think with siphon that wouldn't keep up with the pump ....i've seen inlets both ways and now i'm confused??

