Heaters

Discussion in 'Equipment Articles' started by Kanga, 17 Mar 2010.

  1. Kanga

    Kanga Retired Moderator

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    Aquarium Heaters

    Heaters are used to keep temperatures stable above ambient temperature. Heaters are considered a cheap addition in general. Most used are glass immersion heaters and they have a temperature range of about 20-30 degrees celcius.

    Power

    A heaters strength is determined by its wattage, the larger the tank, and the colder ambient temperature the higher the wattage needed to heat the aquarium. Heaters generally come in the following wattages - 50w, 75w, 100w, 150w, 200w, 250w, 300w.

    Control

    New Heaters have a control to set the required temperature at, an internal thermostat keeps the water at a constant level. Heaters can also be connected to some chillers. This offers excellent temperature control.
    hysteresis : its basically the difference in the ON and OFF temp of the thermostat. Eg: Heater may be set to 26C, but will only turn ON at say 25.5C and turn OFF at 26.5C. therefore the hyteresis is 1C. As far as I know most cheep heaters can have a hysteresis of up to 2-3C, so don't always but the cheapest, think that the Jager claim a 0.5C which is pretty good.

    Titanium Heater

    Some more expensive heaters, such as Aqua Medic, have a titanium sleeve as opposed to glass which is resistant to corrosion and and breakage.

    Heater Guards

    An inexpensive heater guard made of plastic can be used to protect the heater from possible breakage.

    Placement

    Generally the heater is placed in the sump to avoid being seen in the display tank. Care must be taken not to place the unit in an area with too low a flow or an area that is affected by evaporation. i.e. an area in which the level drops when water evaporates such as the return chamber.

    Tank Temperature

    Generally tropical marine tank temperature is considered to be ideal between 25 and 27 degrees celcius.

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    Last edited by a moderator: 10 Mar 2017
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  3. lIghty

    lIghty

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    Very informative Kanga, Thx

    If you don't mind, if I could add one thing to this under the "control" heading which often gets over looked

    hysteresis : its basically the difference in the ON and OFF temp of the thermostat. Eg: Heater may be set to 26C, but will only turn ON at say 25.5C and turn OFF at 26.5C. therefore the hyteresis is 1C. As far as I know most cheep heaters can have a hysteresis of up to 2-3C, so don't always but the cheapest, think that the Jager claim a 0.5C which is pretty good.
     
  4. Louis Scheepers

    Louis Scheepers

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    What about solar heating? I just read in the News Paper that the number of solar geysers being built in a year climbed from 20 000 to 200 000 in SA. Do you guys think that something like solar heating might be possible for our aquariums. Go a little greener... :thumbup:
     
  5. Dane

    Dane

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    @Louis - Solar water heating is one of the easiest things to implement! Don't need fancy panels etc. Just buy some lengths of black piping, put them on your roof in loops and they will get plenty hot! The only thing would be working out a system that turns the regulation on and off. Obviously becomes a problem when theres no sunlight, but I think its a great idea to compliment traditional heaters.
     
  6. Louis Scheepers

    Louis Scheepers

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    You can still keep a regular heater in the tank, just incase the sunlight won't cut it on a cloudy day! It would save a lot of energy during the winter months, but the problem remains how to control it. It like a diy chiller; your heaters have to correct the temperature the whole time... with this setup, the chiller will have to correct the whole time. This might use a LOT more power than a normal heater.

    I am really interested in finding more energy effcient ways to run a reef aquarium. Next year I want to build a 1000liter setup, but the amount of power the lights on a system like that use, can almost run a whole household...

    I think it was on the news about two days ago, that the international bank wont give Eskom a loan, because they use to much coal... we increase the coal usage because of our high power demand, that leads to reefs bleaching, and me not getting my fish and corals in the future!!! :nono:
     
    Last edited by a moderator: 18 Mar 2010
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