Temprature and Evaporation Problem

Discussion in 'Beginner Discussions' started by Raboebi, 26 Aug 2012.

  1. Raboebi

    Raboebi

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    Hi Guys,

    I recently got my 60 liter marine tank, I have a Sicce Scuba 150w heater in. Temp was set down all the way and the tank temp was at 30 celcius, bought a fan from Exotics yesterday to keep the temp down, now the temp is at 25, but it evaporated 5 liters since friday till now.

    Is this normal? With the fan being on since yesterday the evaporation rocketed.

    Just filled it with RO water, did a test and the salinity was fine.

    Should I look at a smaller heater perhaps, maybe some type of cover on the tank, the tank is currently going through its cycle, the lights are off (4x24W Odessea), so how will the lights affect the evaporation when they are on? And we are not even in summer mode yet.

    Rabz
     
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  3. 459b

    459b Moderator MASA Contributor

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    Adding a fan to blow on the surface will greatly increase evaporation. Lights will heat up the tank slightly, thus increasing evaporation. Getting a smaller heater will not make a difference as the heater should switch off when the desired temp is reached.
     
  4. 459b

    459b Moderator MASA Contributor

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    Is your tank open or doesn't have a closed hood?
     
  5. Raboebi

    Raboebi Thread Starter

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    It is open, just can't get the temp stable under 28 with the heater turned all the way down.
     
  6. 459b

    459b Moderator MASA Contributor

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    What pumps are you running? Where abouts is the tank situated?
     
  7. Raboebi

    Raboebi Thread Starter

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    Running 2 x 320 Seio Props and its situated in my study on a cabinet, the room is quite a warm room, my pc is in there and the room gets a fair amount of sun during the day.

    [​IMG]
     
  8. 459b

    459b Moderator MASA Contributor

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    And other equipment? Pumps, especially return pumps, do generate a lot of heat.
    Five liters since Friday is a lot for that sized tank, but if that's how you can keep the temp stable then you'll have to get used to making ro water.
     
  9. Raboebi

    Raboebi Thread Starter

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    All I have is the external HOB Skimmer and a Media rector.
     
  10. Bob the (reef)builder

    Bob the (reef)builder

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    Stop worrying about evaporation.

    It's going to happen with a fan, it's how the fan drops the temp.

    Think about a top-up system, whether you lose 1 liter or five liters a day, you have to top it up.
     
  11. RiaanP

    RiaanP Moderator

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    on average, you loose about 10% per week of the total system volume due to evaporation

    That is why the second thing automated after putting the lights on timers are auto top up systems.

    Check the heater, use your kettle or any other suitable tall container (check the wife's plastic tupperware out). Test it, see if it does maintain its temperature. I could be faulty. But as the lights are that close, and with other internal pumps, most likely it is not the heater overheating the system.
     
  12. Raboebi

    Raboebi Thread Starter

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    Do you guys think I can put the heater in the HOB Skimmer's chamber?
     
  13. RiaanP

    RiaanP Moderator

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    As long as the heater never gets exposed.
    The element and thermostat must both be submerged at all times.
     
  14. Raboebi

    Raboebi Thread Starter

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    The heater was faulty, got it exchanged and everything is fine for now.
     
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