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[APD] RE: Water Temp/Chillers?

Thanks for the response Steve,

My lights are not in any type of enclosure, nor is there any covered glass.
It's a typical acrylic tank with slot cut-outs over the top. There our fours
fans atop the Coralife housing unit. Your are correct and my lights need to
be elevated a few inches above the tank for some air circulation! I'll give
that a whirl. Thanks again,

Vic Di Cosola

Message: 4
Date: Mon, 12 Jan 2004 07:56:38 -0600
From: "Steven Pituch" <spituch at ev1_net>
Subject: [APD] RE: Water Temp/Chillers? 
To: <Aquatic-Plants at actwin_com>

 Vic said,
>my 55g tall tank temp to 80deg F. in prime time. The house temp is around
>70deg. I think my 192w of Coralife lighting are getting things heated up in
>a hurry. (No canopy, they just lay atop the tank).

Steve said,
<<<That's a lot of Watts (4x), light and heat. My limited experience says
lights should never have to raise the tank temperature by any more than a
few degrees over the room temperature (unless you need to do so in an
unheated room).  Raise the lights an inch or so.  Make sure there is an air
space between the light enclosure and the cover glasses _if_ you have one.
Is there a fan in the housing?  If not, putting a few vent holes on the top
of the light fixture enclosure will produce a chimney effect and vent the
hot air around the lights upward.  (Sort of like a cooling tower at a
nuclear power plant.)   If the ballast is in the enclosure you've got to get
rid of the heat.  Heat-wise, its better if the ballast is outside the

This may not apply to your situation, but glass greenhouses capture sunlight
and trap heat.  If you have a tight coverglass that gets hot it will heat
the water and trap the heat so it doesn't escape.  (Sort of like a
residential solar powered hot water heater.)

I'd would do anything to avoid using a chiller. (sounds expensive, and sort
of like a refrigerator).

Steve Pituch>>>

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