Help with cooling fans please

[RJ F.]

Hey yall. I'm back again with another question.

It's now beginning to be warmer here in Maryland. With the warmer temps you can imagine that I have noticed my temp starting to increase in my tank. I posted a pic to show my setup.

I have some left over computer fans and can get a 120v to 12v fan connector.

Question:
Can I mount the fans in the side of my stand sucking air in one side and blowing out the other to move air across the sump to cool the entire tank temp?

I see people blowing air directly on the display but since I dont have a hood I dont want a random fan mounted on the wall. I have (4) 140mm fans that I wanted to use. Will this be sufficient for cooling?

As always, thanks in advance.

 

[Ron Reefman]

I'm in SW Florida and it's already hot here, but I don't have any fans over my tank... other than a ceiling fan in the general area.

What is heating your tank? What kind of lighting are you running? How about the return pump, AC or DC?

I used to have MH lights and AC pumps and ran a chiller outside the house (so I didn't heat the house with chiller). Now with lots of leds and all DC pumps my water stays 79 to 81 degrees, the same as the inside temps in our house.

I would think running fans over your sump should work to cool your water some. But how much is impossible to predict.

 

[RJ F.]

Thanks for the reply.
Lighting is led
Return is DC
Heater is Ehiem 300 watt ( I think)

So my targeted temp is 77F. Past couple days it's been gone as high as 80F. I might be not picking

 

[homer1475]

They do make fans that clip to the rim of your tank.

 

[KStatefan]

Can you point to blow on your sump?

 

[DogsRule]

OP to answer your original question, have the fans pushing air in & then just use existing openings (or cut some) to allow the "hot" air to exhaust out. If you use the fans to pull air out, they tend to fail sooner due to the humidity. HTH

 

[Tyler Bullock]

OP to answer your original question, have the fans pushing air in & then just use existing openings (or cut some) to allow the "hot" air to exhaust out. If you use the fans to pull air out, they tend to fail sooner due to the humidity. HTH

I agree. All fans blowing in. It will find its way out. I am about to do this to my stand as well.

 

[redfishbluefish]

Agree, always blowing in with passive exit point.

In addition, one fan blowing in and one fan blowing out only gives you the CFM of one fan. Two fans blowing in (with passive exit point) gives you two times CFM of air movement.

 

[Aquavaj]

You really need it to blow over the water's surface to be effective. I've tried using a box fan to blow into a stand with the doors opened and it didnt really do much at all. I have a canopy with an opening on top and temps didnt drop until I put the fan on top of the canopy blowing straight into the DT.