Heater Placement

Jan 22, 2007
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Wisconsin Rapids, WI
#1
I have a 29g tank and have my filter right next to my filter intake, I have my heater set at like 75 or something but the thermometer says its 82! do u think my filter is making the water move by the heater and the heater is confused or is the heater broken?*PEACE!*
 

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Orion

Ultimate Fish
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Feb 10, 2003
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Kentucky
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#2
I always like to keep a few extra thermometers laying around that I know are accurate for just such an occasion. You never know, the thermometer may be all that's bad, or at the least a little off. And if it's not, then good chance something is screwey with the heater.

How many watts is the heater?

And I think having it close to the intake is fine. This actualy helps keep any dead spots from forming around the heater helping prevent any hot or cold areas in the water.
 

FroggyFox

Forum Manager
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May 16, 2003
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Colorado
#4
I agree with Orion. If you have a thermometer that you know is accurate try putting that in the water to see if you get a different reading. Do you have the stick on the outside type, or a real thermometer inside the tank? The sticky ones I don't like because they're always reading the outside temperature instead of the inside temperature and easily influenced by the temperature in the room or sunlight etc.

82 is not the end of the world for heat...but if your heater runs high like that you may want to turn it down. If its fluxuating a lot and just happens to be 82 right now and you know its not the thermometer going whacky, then I'd get that heater out of there asap before it fritzes on you and get a new one.

Make sure the thermometer is not right next to the heater...that can also cause your readings to be wierd...I usually put mine on the furthest side of the tank from the heater so that I can make sure there isn't much difference and one side isn't getting colder or something. (I have a bunch of 2 dollar kind that you stick on the inside of the tank, and then a couple of 5 dollar digital ones that are real nice too.)

If you have a heater that is submersible I believe it is best to put it in the tank horizontally (not touching anything) because it will heat the water more evenly. If you put it near the filter then, like Orion said, you'll probably have a more even water temperature. (but most tanks have plenty of water movement that it shouldn't make much difference unless you don't have enough heater for the tank)
 

Sep 6, 2006
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NS, Canada
#6
Yeah, my Hagen (I think?) Elite heater is a little wonky like that. The temp dial says 22 celsius (72 degrees fahren.) and it heats to 27 (80 deg. fahren). I just set it under what I want, and I haven't had any problems other than that. I put my heater next to the filter and the thermometer on the opposite side.
 

FroggyFox

Forum Manager
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May 16, 2003
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Colorado
#7
yeah, as long as its steady. You want to look at it during different times of the day and it can fluxuate a few degrees but if you see it more than say 4 degrees off either way you want to pay extra attention to it. Most of my tanks are a few degrees cooler in the morning before I turn lights on than they are when I turn the lights off at night before I go to bed.