Can 2 fans make a difference in water temp?

[lonewonderer]

Hello everyone, Summer is just around the corner here in the pacific. Now, I have a 35 gallon mixed tank with a simple clip fan that runs all day. Temp stays at 25.3 to 27C. My question is, If I double up with the fan will the temp still go down more? right now ambient temp is around 84F or 29C. Hope someone already tried what I'm asking and have some results. TIA!!!

 

[Fish Fan]

Yes, fans can definitely help increase evaporation which removes heat along with it. Point them so they blow across your surface in your tank or even your sump. Hope that helps.

 

[lonewonderer]

Yes, fans can definitely help increase evaporation which removes heat along with it. Point them so they blow across your surface in your tank or even your sump. Hope that helps.

Hey fish fan, My tank runs 1 fan at the moment and it stays at 25-27c. Do you think it will come down more if I added another fan? Thanks for the reply.

 

[JTP424]

I think it depends on the surface area etc. If your one fan only hits half of the tank, you should be able to cool it down with another (not double as there are other factors that need to be taken into consideration) but it will cool it down a percentage mroe.

 

[lonewonderer]

I think it depends on the surface area etc. If your one fan only hits half of the tank, you should be able to cool it down with another (not double as there are other factors that need to be taken into consideration) but it will cool it down a percentage mroe.

Thanks jTP424 for the input. I will order another fan matbe 3 more since its only $5 here in my area.

 

[JTP424]

If its only $5 yea... bite the bullet :)
Id run a test since youre getting a couple. Check your temp before any fans. Then check the temp after you add each. I.e. you should give us that temp breakdown :)

 

[lonewonderer]

If its only $5 yea... bite the bullet :)
Id run a test since youre getting a couple. Check your temp before any fans. Then check the temp after you add each. I.e. you should give us that temp breakdown :)

Definitely I will update you guys here with some pictures.

 

[Reef Puncher]

Yes, fans can definitely help increase evaporation which removes heat along with it. Point them so they blow across your surface in your tank or even your sump. Hope that helps.

ohhh would a fan in the sump really work?

 

[Yodaman]

I have 2 fans on my 65 gallon tank, and I programmed my Apex to turn it on whenever the tank needs cooling.

The room faces west sun in the summer time, and all of last summer, or any very sunny day when the tank warms, the 2 fans cycle on and off regularly and I never see anything about 78.6 degrees F

Definitely add the second fan

 

[Fish Fan]

ohhh would a fan in the sump really work?

It wouldn't be as efficient as a fan blowing across the surface of the whole tank, but better than nothing I would think. As mentioned above, the surface area the fan blows across has a lot to do with it.

 

[Subsea]

Yes, more fan movement of air across gas/water interface will evaporate more.

I use 4” pancake fans on top of HOB filter. Instead of increasing surface area, this increases water voume and air volume more aggressively.

Another advantage of bowing air on display tank surface is to remove heat from lights.

However, just as water pressure increases flow rate and heat transfer thru liquids is increased with the temperature differential;

While evaporation is increased with with more air flow & more water flow YET humidity in the home is the Iimiting factor. Here in the Deep South, moisture is 70% of our air conditioning heat load. It’s called latent heat.

In HVAC (heating, ventilation, and air conditioning), latent heat refers to the heat involved in a phase change, like water turning from a liquid to a gas or vice versa, without a change in temperature. This is different from sensible heat, which is the heat that changes the temperature of a substance.Latent heat is crucial in HVAC because it significantly impacts humidity levels and system performance.

 

[Reef Puncher]

It wouldn't be as efficient as a fan blowing across the surface of the whole tank, but better than nothing I would think. As mentioned above, the surface area the fan blows across has a lot to do with it.

so it worked! i added a fan in my sump (it wouldnt have looked right above my tank), and ever since i added it, my tank has stayed locked at 78, no more climbing to 80 so far! great recommendation

 

[Fish Fan]

so it worked! i added a fan in my sump (it wouldnt have looked right above my tank), and ever since i added it, my tank has stayed locked at 78, no more climbing to 80 so far! great recommendation

Glad it worked for you!

 

[Mr. Mojo Rising]

IME a fan will lower the water temp by 2 or 3 degrees. I don't know if a pair of fans would double the cooling off, or same 2 or 3 degrees?