i'm curious, why would increasing the size of the sump work? i would think
that since the pump is emptying it, eventually either the pump will empty
the sump and run dry, or the tank will overflow because not enough water is
coming out of it.

"Wayne Sallee" wrote in message
link.net...
How many gallons of fluctuation are you getting between pump on, and pump
off?
What's the size of your tank?

Wayne Sallee


TekCat wrote:
the return area of the sump is only 3 gallons, so it gets "dry" fast. I
could try to make bigger sump, or ... maybe making new teeth in overflow
skimming box could do the trick?



"Wayne Sallee" wrote in message
link.net...

Get a biger sump, and/or improve your overflow.

Your water level in the sump will drop when the pump is running, and go
back up when the pump is not. Does the tank come close to overflowing, or
does the tank water level run at a normal level?

Wayne Sallee


Charles Spitzer wrote:

"TekCat" wrote in message
...


I have a Quietflow 600 hang on overflow box... supposedly it should
take
care of 600GPh. Also I have pump that is pumping from sump to the
tank, it
is Dolphin DP 560. With 2' head loss the chart says it would output
460GPH.
So far so good, but the overflow doesn't seem to take 460gph quite
well, I
get my sump's return area empty very quickly, this means one thing that
the
pump pumps faster than overflow can handle. Any thoughts on how to
solve
this?


throttle the output side of the pump, or get another/bigger overflow.