Metal Halides

[Dan Norgard]

Hi;

I am building/upgrading my hood to take a 250w Metal Halide. The T8s
currently in it are about 4" from the water's surface, protected from
splashes by a glass cover.
Realistically, how far from the surface should the MH be? Will it affect
the plastic hinges of the glass? The tank is 48w x 22t.

I'd like to keep the glass to protect the bulb.

Thanks,

Dan

[Marc Levenson]

Dan, you don't need the glass any more. It will trap heat and your tank will
get too hot with MH. Plus it inhibits oxygenation of the water.

The MH needs to be 9" to 12" off the water. Put a fan or two in your canopy
while you are remodelling. Trust me, it made a huge difference. I put my fans
in the top of the canopy, blowing down onto the water, and my tank doesn't go
over 82F ever. With the extra fan over my sump during the daytime, the tank
stays right around 80F.

Marc


Dan Norgard wrote:

> Hi;
>
> I am building/upgrading my hood to take a 250w Metal Halide. The T8s
> currently in it are about 4" from the water's surface, protected from
> splashes by a glass cover.
> Realistically, how far from the surface should the MH be? Will it affect
> the plastic hinges of the glass? The tank is 48w x 22t.
>
> I'd like to keep the glass to protect the bulb.
>
> Thanks,
>
> Dan

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com

[Dan Norgard]

Thanks again, Marc! I'll bend up a canopy addition today at work.
Dan


"Marc Levenson" > wrote in message
...
Dan, you don't need the glass any more. It will trap heat and your tank
will
get too hot with MH. Plus it inhibits oxygenation of the water.

The MH needs to be 9" to 12" off the water. Put a fan or two in your canopy
while you are remodelling. Trust me, it made a huge difference. I put my
fans
in the top of the canopy, blowing down onto the water, and my tank doesn't
go
over 82F ever. With the extra fan over my sump during the daytime, the tank
stays right around 80F.

Marc


Dan Norgard wrote:

> Hi;
>
> I am building/upgrading my hood to take a 250w Metal Halide. The T8s
> currently in it are about 4" from the water's surface, protected from
> splashes by a glass cover.
> Realistically, how far from the surface should the MH be? Will it affect
> the plastic hinges of the glass? The tank is 48w x 22t.
>
> I'd like to keep the glass to protect the bulb.
>
> Thanks,
>
> Dan

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com

[Dan Norgard]

Holy Cow! That 250w puts out some heat!
Dan


"Dan Norgard" > wrote in message
...
Thanks again, Marc! I'll bend up a canopy addition today at work.
Dan


"Marc Levenson" > wrote in message
...
Dan, you don't need the glass any more. It will trap heat and your tank
will
get too hot with MH. Plus it inhibits oxygenation of the water.

The MH needs to be 9" to 12" off the water. Put a fan or two in your canopy
while you are remodelling. Trust me, it made a huge difference. I put my
fans
in the top of the canopy, blowing down onto the water, and my tank doesn't
go
over 82F ever. With the extra fan over my sump during the daytime, the tank
stays right around 80F.

Marc


Dan Norgard wrote:

> Hi;
>
> I am building/upgrading my hood to take a 250w Metal Halide. The T8s
> currently in it are about 4" from the water's surface, protected from
> splashes by a glass cover.
> Realistically, how far from the surface should the MH be? Will it affect
> the plastic hinges of the glass? The tank is 48w x 22t.
>
> I'd like to keep the glass to protect the bulb.
>
> Thanks,
>
> Dan

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com

[Marc Levenson]

Thus the need for it to be 9" off the water, and a cooling fan in the canopy. ;)

Marc


Dan Norgard wrote:

> Holy Cow! That 250w puts out some heat!
> Dan
>
> "Dan Norgard" > wrote in message
> ...
> Thanks again, Marc! I'll bend up a canopy addition today at work.
> Dan
>
> "Marc Levenson" > wrote in message
> ...
> Dan, you don't need the glass any more. It will trap heat and your tank
> will
> get too hot with MH. Plus it inhibits oxygenation of the water.
>
> The MH needs to be 9" to 12" off the water. Put a fan or two in your canopy
> while you are remodelling. Trust me, it made a huge difference. I put my
> fans
> in the top of the canopy, blowing down onto the water, and my tank doesn't
> go
> over 82F ever. With the extra fan over my sump during the daytime, the tank
> stays right around 80F.
>
> Marc
>
> Dan Norgard wrote:
>
> > Hi;
> >
> > I am building/upgrading my hood to take a 250w Metal Halide. The T8s
> > currently in it are about 4" from the water's surface, protected from
> > splashes by a glass cover.
> > Realistically, how far from the surface should the MH be? Will it affect
> > the plastic hinges of the glass? The tank is 48w x 22t.
> >
> > I'd like to keep the glass to protect the bulb.
> >
> > Thanks,
> >
> > Dan
>
> --
> Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
> Business Page: http://www.sparklingfloorservice.com
> Marine Hobbyist: http://www.melevsreef.com

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com