Heating my tank

Discussion in 'General Discussions and Advice' started by neo, 29 Apr 2010.

  1. neo

    neo

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    Hello,
    Normally people struggle with cooling but I struggle with heating my tank.
    Tank used to sit at 25deg on avg with the heaters set for 26deg.
    During the last 2 weeks cold weather the temp dropped to avg 24deg, dipping below 24 on times. With the heaters still on 26deg they were more off than on.
    I increased the setting on the heaters to 28deg and they seem to be on longer now but my tank temp is struggling to stay at 25deg.

    I have 2 heaters, one 300w and one 200w, total system volume about 380l, heaters located in water above DSB.
    Any ideas on how to reach a more stable temp of avg 25.5 deg ?
     
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  3. viper357

    viper357 Admin MASA Contributor

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    What are you using to measure your temp and are you sure it's accurate?
    Invest in some Jager heaters.
     
  4. jacquesb

    jacquesb Retired Moderator

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    The add another heater, Neo. I have one in my sump as well as one in my DT...
     
  5. Fires

    Fires

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    Hi Jacques,just wanna find out from you,if my Cal is sitting on 550,how do i bring it down ??
     
  6. viper357

    viper357 Admin MASA Contributor

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  7. neo

    neo Thread Starter

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    I'm using a digital thermo.
    If I'm not mistaken the Jager heaters are 500mm long, dont think they will fit, have to check.

    what about these over priced digital temp controllers, they any good ?
     
  8. viper357

    viper357 Admin MASA Contributor

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    Cheap digital thermometers can be out by a degree or two, so if it says 25 then it could be between 24 and 26, from my experience with them anyway, which isn't really a problem, temp fluctuations overnight of a degree or 2 will not cause any harm.

    Instead of buying an overpriced digital temp controller, buy 2 x 200w Jager heaters, their thermostats are accurate and reliable. If you set your Jager on 25, your tank will be very near 25, unlike these other cheap chinese heaters that you put on 28 and your water is 23, then tomorrow your water is 31 etc. :p
     
  9. jacquesb

    jacquesb Retired Moderator

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    Neo - all they do, is switch on either a chiller or a fan to cool off the water, or switch on a heater to heat up the water - this is done automatically.

    You need to either upgrade your heater, or get another one of the same wattage.
     
  10. neo

    neo Thread Starter

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    thx viper, will look at the jagers, are there any rule of thumb for deciding the amount of watts one need for a specific tank volume ?
     
  11. viper357

    viper357 Admin MASA Contributor

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    The Jagers are rated according to their wattage, so a 200w heater is rated for a 200 litre tank.

    Are both your heaters currently in the same chamber? If so then try placing one in the first chamber and leave one in your DSB chamber. You could also buy some 10mm polystyrene and clad your sump in it during the winter months, we lose a hell of a lot of heat through the glass, the polystyrene will help retain the heat a bit.
     
  12. neo

    neo Thread Starter

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    yes the heaters are in the same compartment.
    my stand is still open, no cabinet, so i will speed-up the closing of it and also look into the jager and polystyrene.
    thx all for the ideas
     
  13. viper357

    viper357 Admin MASA Contributor

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    The heater that is in your DSB, you need to raise that as high up as possible, due to the slow water movement in the DSB, if the heater is low down then it is not going to get into contact with the cold water flowing across the surface, so your heating will not be very efficient. Try to place your heaters where there is decent, visible water movement.
     
  14. neo

    neo Thread Starter

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    Update:
    Had 4 deg plus temp swings during the night and even during the day the temp would easily swing 2 deg.
    I moved the heaters and adjusted the setting and this helped slightly.
    Then I put polystyrene all around my sump and presto!!
    During the day the temp now stay in a sub-1 degree band and during night the temp drops no-more than 2 degrees, I even lowered the setting on the heaters.
     
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