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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