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Old 03-16-2013, 10:03 PM   #1 
Julio1983
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Heater/thermometer question

Hi :)
Ok so I noticed this morning that my thermometer said 25!!
It normally sits at 26, so it's dropped over night.
I stuck my finger in the water and it felt nice and warm.
Then I thought maybe my heater isn't working??
It was set on 26. I put it onto 28 and no light came on.
It only came on when I cranked it to 30.
Of course I immediately lowered it back to 26.
What's going on?!
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Old 03-17-2013, 12:33 AM   #2 
ryancalif
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I think you need something better to do with your time, lol.

I would say let the heater do its thing. It sounds like it's working fine to me. What brand is it?

Last edited by ryancalif; 03-17-2013 at 12:35 AM.
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Old 03-17-2013, 12:39 AM   #3 
Julio1983
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Gee thanks! Haha

Not sure of the brand, but it's fairly new
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Old 03-17-2013, 12:48 AM   #4 
pittipuppylove
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Sounds pretty normal to me - my tanks will sometimes drop a degree or so overnight (although I go by *F, so a degree for me is smaller than a degree for you). So long as the water temp doesn't change suddenly, a healthy betta should be ok.

And my heaters will do that, too. I think it can just take them awhile to "notice" that the settings have changed and that it needs to turn on. I'd be more concerned if you turned it up and the water temp hadn't changed after an hour or so.
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Old 03-17-2013, 12:49 AM   #5 
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Hmmm. Well, different heaters have different levels of precision. Yours might have a wider cycle range than others. It doesn't sound like there is anything wrong with yours though.

I know with my EHEIM Jager, once the heater turns off, I can increase the temperature select dial 5 or 6 degrees before the heater actually turns on. However, the heater still maintains 79 degrees very tightly (+/- 0.5 degrees). The bottom line is to set the heater at the desired temperature and let it do it's job. Now if the water temp is swinging by more than say, 2 or so degrees C, your heater may have a defective thermostat, or the heater is just poorly designed.

Last edited by ryancalif; 03-17-2013 at 12:53 AM.
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Old 03-17-2013, 06:46 PM   #6 
Julio1983
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Thanks for the responses :)

I noticed after changing his water last night that it took overnight for the temp to go back up to 26, so thats a good thing right? That its gradually increased to the right temp and not suddenly?

Gosh who knows i just had the biggest freak out!

The brand is aqua one and its 25w.
I had a 15w one that was causing temp swings.

I also purchased a new thermometer just to check and it was reading the same temp as my current one.

PS he HATES the new thermometre!! He flared up at it!!! Needless to say its not in there anymore... fussy little thing!
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Old 03-17-2013, 10:44 PM   #7 
CrazyDiamond
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Sounds like there isn't much of a prob ;) but I also had some big temp swings and was told to move the heater closer to the filter so it could evenly distribute the heat and everything is A-OK now :)
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Old 03-17-2013, 11:03 PM   #8 
Julio1983
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i dont have a filter as my boy is in a 15 litre tank...
normally everything runs fine, not really sure what happened the other day, or if maybe i was being a bit too pedantic!
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Old 03-17-2013, 11:15 PM   #9 
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My tank used to fluctuate 5 degrees F between night and day and someone told me it would stress my fish . . . even if the fluctuation was over several hours, I honestly don't think a fluctuation that takes hours to happen will harm a fish :)
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Old 03-17-2013, 11:16 PM   #10 
Julio1983
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gosh i hope not!
im still rather new at this hence the stress outs hehehe
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