heaters

Discussion in 'New Members' started by mandrin, 28 Sep 2011.

  1. mandrin

    mandrin

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    hi guys
    can u please advise
    i have a submersible heater in my 37 l nano
    50w and the heater only comes on when i turn the knob to adjust temp
    so wat happens is wen i turn it below 26 and bring it back up , it stays on for like 2 hours and and never comes back on :( until i do the same

    pls excuse me for asking silly questions
     
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  3. Galen

    Galen

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    What make is the heater?
     
  4. mandrin

    mandrin Thread Starter

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    its a dophin..... 50w
     
  5. Galen

    Galen

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    Bi-Metallic Thermostats
    Most heaters use a bi-metallic strip to turn the heater on and off in order to maintain the temperature in an aquarium. It expands as the aquarium gets warm and contracts as the aquarium cools, opening and closing an electrical contact which controls the heater coils. When the contacts close, the heater light comes on. When the contacts open, the light goes out. Unfortunately, this metal strip can only open and close so many times until it eventually wears out. Just imagine bending a thin piece of wire back and forth slightly several thousand times. It’s only a matter of time until the wire weakens and breaks.


    Why aquarium heaters fail
     
  6. mandrin

    mandrin Thread Starter

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    thanks Galen for that ..........gues the heater is faulty
    cause i got it for jus 2 weeks ......and its gotten a bit cold in durban this few days ....think i shud go return it ...
     
    Last edited: 28 Sep 2011
  7. Galen

    Galen

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    I don't mean to sound like a hypocrite as i myself have 2 dophin heaters and they working - ish. The tank temp seems to fluctuate a bit.... but i have been told its not particularly a good brand out there. I plan on changing them within the next week or 2. Sorry i couldn't be more help but i suggest you hang on a bit, maybe the more knowledgeable peeps out there know a secret or two that i too could learn :) .
     
  8. zayd

    zayd

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    Thanks. Better change my heaters soon. Luckily, I have 3 heaters just in case.........

    Is there any use for the old heaters or must we just discard (obviously recycle) them?
     
  9. Galen

    Galen

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    Glad i could help :)
     
  10. mandrin

    mandrin Thread Starter

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    thanks man terll me how long does yr heater take to go of silly question i know and is yrs like at the buttom of tank or jus at the min qater level on heater
     
  11. Galen

    Galen

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    Mine at times takes 5 hours before it goes off. They at the bottom in the sump
     
  12. mandrin

    mandrin Thread Starter

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    k and like k mine is in the main tank is yrs up rite or side ways the heater
     
  13. ScottK

    ScottK

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    Are there types other than bi-metallic?
     
  14. Tony

    Tony

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    I have bleated on the heater saga before and how innacurate the cheaper heaters are. I had endless overheating problems during summer and I switched to Jager heaters and my temp rarely fluctuates by more than a degree.
     
  15. ScottK

    ScottK

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    I am having endless issues getting it consistant. I go for a week where it's solid between 25.6 and 26.4 which I am happy with and then all of a sudden I get home one day and it's sitting over 27 :(

    Maybe I should invest in a Jager.
     
  16. zayd

    zayd

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    Jager is more accurate, but the bi-metallic strip will still after years of use give problems like mine. I have 2 that do this. But I have ahd them for 5 yrs.
     
  17. Tony

    Tony

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    Also one doesnt need too many heaters in summer. I run my 650 litre on one 300 w Jager and add another one in winter
     
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