Watts/Temp elevation

[SaltyDr]

Can anyone tell me ROUGHLY how many watts of power from pumps would equal 1 degree of water temp rise? My tank is running 83 degrees (steady 24/7) with no heater, just from the pumps/powerheads. I would like to decrease this a couple of degrees and was wondering if I get new equipment that consume less power and thus put off less heat would this actually decrease water temp or do I need a chiller or get a fan and have to increase top off to get to 80-81. Thanks

 

[SaltyDr]

Anyone? The tank is a 75 and total system volume is about 100 gallons which I forgot to mention.

 

[Osmotic Shock]

I can't help with the calculation but a simple fan will really help get your temp down. My temp was up to 83.5 last week. I bought a $5 fan from WalMart and put it in the canopy on a timer to be on when the lights are on. Temp is a steady 81 now.
On my last tank I had 2 fans- one in the canopy and one blowing into the sump. That setup also kept the temp down and steady. I had to top up alot more water each day but it is a lot cheaper than a chiller.

 

[SaltyDr]

There are 2 fans in the canopy that come on when the lights come on and that's why the temp doesn't change. I ran the fans with the lights off and it was 80-81 so I know fans will work. I already have to top off 1 gallon a day and just don't want to do more than that if possible. I am about to implement an ATO consisting of a 5 gallon Culligan water jug with a drip system of IV tubing, but I fear with the fan in the sump I'll need to fill that every 2 days or so and was hoping for a less intense ATO setup.

 

[Osmotic Shock]

I hear ya.