Discussion in 'Reef Talk' started by Chris A., Dec 29, 2017.


1 degree a big swing daily?

  1. Yes

  2. No

  1. Chris A.

    Chris A. Formally toomanyfish BRS Member

    Is 1 degree a big deal in daily temp swings?
  2. gurumasta

    gurumasta Senior Moron BRS Member

    I say no way not a big deal. 1 degree in temp is nothing....
  3. Nixperience

    Nixperience Well-Known Member BRS Member

    I think if you have a controller, there’s no reason for any swing.
  4. Chris A.

    Chris A. Formally toomanyfish BRS Member

    This is the result of having a apex and knowing that it actually swings lol
    Out of sight out of mind, now it’s slapped across my face and phone :confused:
  5. Chris A.

    Chris A. Formally toomanyfish BRS Member

    I’m not running a heater
  6. gurumasta

    gurumasta Senior Moron BRS Member

    I know reefers that set 3 degree hysteresis on their controllers...

    I personally don't I only swing about half a degree but a few degree swing daily is probably only natural really..
  7. Chris A.

    Chris A. Formally toomanyfish BRS Member

    That’s the swing of the LED’s
  8. Nixperience

    Nixperience Well-Known Member BRS Member

    I set mine to .2 swing. I have a fan to kick on if it gets higher, so it stays very tight.
  9. cilyjr

    cilyjr Chris Staff Member Moderator BRS Member

    my heat regularly swings from 77 to 79
    Cpage101 likes this.
  10. jasonrusso

    jasonrusso Well-Known Member BRS Member

    I use my Apex to protect against overheating. I set the outlet to turn off at 81.5 degrees just in case the heater gets stuck, but I let the heater's thermostat do it's thing.

    My reef tank moves about a 1.5 degrees, but the heater never turns on. The pumps and light warm it to about 80.5 during the day and it goes down to 79 at night.

    A natural reef has temperature swings, clouds, storms, etc. We seem to forget that when we try to simulate reef conditions.
  11. nemodan

    nemodan Well-Known Member BRS Member

    That is my Temp daily variation. [​IMG]

    Sent from my SM-G955U using Tapatalk
    Nixperience likes this.
  12. vedau

    vedau Non-member

    I think even a swing of 5 degree in a day is normal. Corals should be fine just the sensitive us.

    In natural, I believe reef islands do get cooler at night time and hotter during the day. I used to live less than a half mile from reef islands and the ocean do get cooler at night time and very wicked hot during day . (More than 10 Fahrenheit swing)
  13. Spudsly

    Spudsly Non-member

    One reason to allow swings is just to go easier on the components. By rapidly shutting the heater on and off you are giving it lots of opportunities to get stuck or malfunction. I think it's totally fine to allow 1-2 degree temperature swings (and probably more, honestly).
  14. Bao

    Bao Well-Known Member BRS Member

    1 degree F is nothing. In the summer, my tank usually goes from 78 to 83 everyday.
  15. nemodan

    nemodan Well-Known Member BRS Member

    When you have a couple of $1k dollars in corals in your tank, for me is a non-discussion topic not having , at least, a $100 reefkeeper to control the heaters.

    As I do not like to have all the eggs in the same basket, my heaters are all controlled by more then 1 reefkeeper ( 1 in the DT and another in the fuge). Moreover, I have more than one heater in each tank (2 at minimum) and each one is underrated for the tank. Also, all of them have their on/off setup 1 degree over the controller max temp setup. In that way you cover many potential errors / malfunctions.

    My APEX, concerning temp, is just for the graph. But , I really do not need it for that. You can see how the reefkeeper get the temp with the parameters I set it up. Today I am using my APEX only to control my DOS system. And to check the tank parameters during my travels (like PH, temp and dosing). But this is me. Others will disagree.

    Cheers !
    Nixperience likes this.
  16. this is me

    this is me I like turtles BRS Member

    It depends on other parameters as well. If your corals are already struggling in the tank due to other parameters, a little bit of temp fluctuation will push it over the edge.
    It's very easy to keep the temps stable in the winter time. It's easier to heat water than to cool it. In the winter time, you should be able to control a much tighter fluctuation. For most, it should be within the hysteresis of the controller. In the summer time, it's a total different story. And the amount of temp spike your corals can handle will depend on other parameters as well.
    For my tank, winter time +/-0.2degrees. For summer time, +2degrees during the halides period. On a really hot day and if I forgot to turn on the AC, the temps will hit the max +3 degrees in which case the halides will turn off.
    If you run your tank normally at 76, a +5 degrees might not be that bad. If you run your tank at 80degrees, a +4 degrees can do some damage. I personally wouldn't look at the absolute change in other people's system. I would keep the tank at the temperature I'm comfortable of keeping it stable and have the +/- window as small as possible.
    nemodan and Nixperience like this.
  17. Rgbpixels

    Rgbpixels Active Member BRS Member

    I run with a 1 degree swing (78-79) and was wondering the same thing. I can change the Apex to have less of a swing but at the cost of additional wear and tear on the equipment.

    Sent from my iPhone using Tapatalk

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