lowering tank temp

bullit67 · #1 02-12-2005, 11:59 PM

Well now that I have 2 Bigger pumps in my new sump and a MH light I seam to have a temp problem it is running around 85 a little to warm dose any one have any Ideas other than a chiller I have thought about using a couple of fans blowing one up the back of the tank one across the top to move some of the hot air created by the light

StirCrazy · #2 02-13-2005, 12:20 AM

suspend two fans above your sump pointing strait down at the water. this will drop your temp considerably.

also have one blowing through your hood to remove built up heat from the MH.

Steve

Richer · #3 02-13-2005, 04:03 AM

I lowered the halides (2x175w MH and 1x95w vho) on my tank a few inches and ended up increasing the temps of my tank by a couple of degrees. A computer fan mounted on the side of the canopy fixed that problem quite nicely.

-Rich

bear27 · #4 02-13-2005, 04:59 AM

How do you run computer fans on normal plugins I thought they needed a difernt voltage

Richer · #5 02-13-2005, 05:08 AM

I run a computer power supply for my auto topoff and fans for my bare ballasts. So it was just a simple case of extending the wires on the fan and plugging it into the power supply. It was cost effective for me, because I have a bunch of fans sitting around doing nothing.

I suppose you could just as easily solder the fans onto a 12v transformer as well.

-Rich

Willow · #6 02-13-2005, 05:13 AM

is there such thing as a molex to outlet plug? i have a pile of computer fans around and would like to start plugging them in but not sure what to do. i have a bigger fan that i just wired a plug to and it worked, can i do that with these 80mm fans?

Richer · #7 02-13-2005, 05:19 AM

Quote:

Originally Posted by Willow

is there such thing as a molex to outlet plug? i have a pile of computer fans around and would like to start plugging them in but not sure what to do. i have a bigger fan that i just wired a plug to and it worked, can i do that with these 80mm fans?

It would be nice if you could wire a fan directly into a outlet... but unfortunatly, you cannot. Computer fans run on 12V DC power (at the most)... plugging a fan directly into an AC outlet would put a of AC power through the fan. I wouldn't want to know what the results of that would be

The simplest way would be to buy a 12v DC transformer and wiring the fan into that. Wiring multiple fans in serial should work if you want to run multiple fans. You could also acquire a computer power supply to give you more than enough juice to wire enough fans to make you go deaf. AT power supplies are the easiest to use in this application, but are hard to come by nowadays... maybe a computer junk store would still have a couple sitting around. ATX power supplies could be easily jumpered to work without a motherboard.

-Rich

takphan · #8 02-13-2005, 05:45 AM

i remember there was a super duper used computer store in Vancouver
a warehouse full of computer parts

i would check them first.

Willow · #9 02-13-2005, 05:47 AM

jebus an at power supply is what 250 watts on average? that’s kinda extreme isn’t it?

Richer · #10 02-13-2005, 08:29 AM

For the last couple of years the minimum requirements for most computers have been 300+ watts

. I run 450watt psus on all of my computers

.

Its not really all that extreme. A power supply won't use that much power unless it has to. If the only thing feeding off of it is a little 12vdc fan, then thats all the power its going to draw.

-Rich