cooling fans - Aquarium Advice

75gMKT · 08-28-2006, 01:52 PM

How big of fan do i need to properly cool my 2 250w metal halide bulbs, i'm planning on using two, one to pull in and one to push out. Also what do i use to power them.Thanks

dskidmore · 08-29-2006, 07:38 AM

Are you running open top, or is there glass on the bottom side?

Do you have any experience designing DC circuts?

Any old DC transformer of the right voltage will work for power. I have a small pile in the attic that used to belong to phones, radios, etc. You know, the big squarre box that plugs in to the wall, and has a slender cord and a round end that goes into a device? The voltage needed should be stamped on the fan. If you can't find one of the right voltage, a lower voltage one will just run the fan slow, a higher voltage one can be wired with some resisters in series with the fan. Radio Shack will have transformers if you can't find one you're not using.

08-28-2006, 01:52 PM	#1 (permalink)
75gMKT Aquarium Advice Apprentice Join Date: Feb 2006 Location: North Mankato, Minnesota Posts: 15	cooling fans How big of fan do i need to properly cool my 2 250w metal halide bulbs, i'm planning on using two, one to pull in and one to push out. Also what do i use to power them.Thanks

08-29-2006, 07:38 AM	#2 (permalink)
dskidmore Aquarium Advice Addict Join Date: Aug 2005 Location: Genesee Valley Posts: 2,178 Images: 1	Are you running open top, or is there glass on the bottom side? Do you have any experience designing DC circuts? Any old DC transformer of the right voltage will work for power. I have a small pile in the attic that used to belong to phones, radios, etc. You know, the big squarre box that plugs in to the wall, and has a slender cord and a round end that goes into a device? The voltage needed should be stamped on the fan. If you can't find one of the right voltage, a lower voltage one will just run the fan slow, a higher voltage one can be wired with some resisters in series with the fan. Radio Shack will have transformers if you can't find one you're not using. __________________ 75 gallon freshwater Baby shrimp sighted! 2.5 Gallon unpowered freshwater now with high light 0.25 gallon palmtop doomed to an unlit end?

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