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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