FWIW, the best way to do it is using a float switch.  Guessing is only going
to cause you problems.  I have a liquid level controller made by Spectrapure
which works wonderfully!

Craig

> The amount will change from summer to winter. I think you will have to
make
> a try and them find it out.
> Good luck
> Walter
>
>
> > Hi all,
> >
> > I'm just finishing the equipment setup on a new reef tank, and I'm
> > trying to find the answer for something I don't know how to calculate or
> > estimate.  I've got a medical dosimeter attached to a 3 gallon carboy
that
> > I'm going to be using to replace all water lost to evaporation with
> > Kalkwasser.  What I don't know is how much water will be lost.  The tank
> is
> > 65 gallons with a surface area of 648 sq. in. (36" x 18").  The water
will
> > probably stay at right about 80 F (I don't have a chiller).  There is
some
> > surface agitation, but it's not extreme.  The top is open to the air (no
> > hood), and there's plenty of circulation (~18 tank volumes/hour) in the
> > tank, so I don't expect much heat addition from the lighting (esp. since
> the
> > assembly is well ventilated).  My dosimeter can be set in mL/hr.  Any
> ideas
> > where I should start the flow rate?  I know I can adjust the rate to be
> near
> > perfect as time goes on, but I don't know what ballpark range I should
try
> > to begin with.  Any ideas would be appreciated.
> >
> > Thanks,
> >
> > James Payne
> > [EMAIL PROTECTED]

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