Pump heat?

[Snausy]

I'm wondering if this sounds right to you guys...

I've had my 100g(40g breeder sump) for many years now and I've always been able to maintain the temp at around 78 degrees with my various pumps/heater.

The pump list is as follows:

Ehiem 1262 return
Askoll 1500 with my skimmer
3x Koralia 4(old model)
2x Koralia Evolution 1600

I always had 4x Koralia 4s but one died and I got the two evolutions recently to replace it.

I also added two GFO reactors that have MaxiJet 1200.

So there are three new pumps, two maxijet 1200 and one Koralia 1600...and now my temperature sits at 83 degrees in the middle of a cold night without the heater turned on. I had a stealth heater but they all got recalled so I just unplugged it and the temp stayed put. Apparently I don't need a heater.

Does this seem right to you guys? I keep my house temp at 70 degrees and the watertemp is 13 degrees higher without any heater in the middle of the night without lights? I fear for the summer coming. I don't have a chiller.

Can adding two maxijets and a koralia bump my temerature 4-5 degrees? If so how do you suggest I deal with the situation?

Thanks for any replies. I have checked all the pumps and they are working, not stuck just creating heat.

 

[James77]

It can, sure.... The pump watts are heat into the aquarium, so you pretty much just added a 50+ watt heater running all the time.

 

[sjm817]

If you can achieve the perfect balance of enough (but not too much) heat added to your tank by pumps and lights to keep the temp with no heater or chiller, you have an efficient system. Looks like you now have a little too much.

 

[MattAndKim]

A fan will keep your temperature down.

 

[Snausy]

Thanks for the replies. I set up a small fan clipped on the sump blowing across the top of it. Usually only use it during the summer but it looks like either I drop a Koralia or keep the fan going.

My next question is:

Will the same situation exist with the same pumps in a tank with triple the volume? I'm moving from a 100 to a 300 in the next month or so when I finally finish my micromesh work. If the larger volume brings down the temp I won't worry about it so much and just get crackin on the new tank. Our new baby kind of put all that on hold.

 

[MattAndKim]

The heat loss to ambient will be roughly proportional to the relative change in area of the tank. It will come down, if it doesn't come down enough, get a bigger fan. A relatively small fan is necessary to export a very large amount of heat through water vaporization due to the massive latent heat of vaporization of water.

 

[James77]

You'll still have the same heat added, but it takes more energy to keep a larger tank warm, so you will notice it less. More heat lost through more surface area in the water and glass