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  1. #1

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    Arthritis - Child Abuse - Colon Cancer - Colorectal Cancer - Dystonia - Education - Free Speech - Interstitial Cystitis - ME/CFIDS - Reye's Syndrome - Save the Music - Teens Against Smoking - Victim's Rights - Water Quality - mrramsey   Breast Cancer - Birth Parents - mrramsey   

    Default Thermometers - Digital vs Old School


    0 Not allowed!
    Hi All~

    Well amidst my 72g project I have purchased 2 digital thermometers and have a large variance between the two I have a good 1.2 degree difference between the two. I would love to find something that is accurate. I was wanting to monitor the temp in my sump and in the tank. Haha maybe I am making too much of this but it just bugs me when readings don't match.

    The two I have are a Coralife (the most accurate of the two but was .8 degrees high when tested spec says accuracy is +/- 1.5) The second is a Marina (it tested 1.2 degrees low I am sure it has a similar spec.)

    What do you all use and how accurate are they?
    Mike
    120g Mixed Reef In Progress
    120g Reef Journal
    55g Freshwater - Out of Service
    My 55g Tank Remodel Project
    72g Bowfront -Out of Service

  2. #2

    Join Date
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    Default


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    I use old school glass thermometers in all of my tanks. They haven't failed me yet.
    Adventures in Aquaria - The KevinVA Story

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  3. #3

    Join Date
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    Default


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    Me too - I have one that suctions inside the tank to the glass. Not that people won't recommend digital ones though. Perhaps one of them is closer to a heater?

  4. #4

    Join Date
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    Arthritis - Child Abuse - Colon Cancer - Colorectal Cancer - Dystonia - Education - Free Speech - Interstitial Cystitis - ME/CFIDS - Reye's Syndrome - Save the Music - Teens Against Smoking - Victim's Rights - Water Quality - mrramsey   Breast Cancer - Birth Parents - mrramsey   

    Default


    0 Not allowed!
    Quote Originally Posted by andreahp View Post
    Me too - I have one that suctions inside the tank to the glass. Not that people won't recommend digital ones though. Perhaps one of them is closer to a heater?
    Nope I tested them both side by side in the same location. I also did a calibration test using crushed ice and water - this will yield a 32 degree temp to check the accuracy of a thermometer. The Marina gave a 30.9 degree temp and the coralife gave a 32.7 degree temp. I like the digital ones for readability. I might try to open one to see if there is an adjustment on the board.
    Mike
    120g Mixed Reef In Progress
    120g Reef Journal
    55g Freshwater - Out of Service
    My 55g Tank Remodel Project
    72g Bowfront -Out of Service

  5. #5

    Join Date
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    Default


    0 Not allowed!
    I use an old school glass one as well. The only thing I don't like about it is that I feel like it takes it a long time to adjust the temperature reading. What I mean by that is, I use a gallon water jug to refill my ten gallon tank when I do a water change. Our water has a tendency to swing in temperature so I have to recheck the temp of each gallon jug and it seems like the thermometer takes a few minutes sitting to reflect the correct temp.
    Does your digital themometer give an instant reading? I've been thinking of getting one for this exact reason. It won't hurt it to be off by a degree or two for waterchanges and it would be nice to have that peace of mind.
    ~Manna
    120 gallon FW bowfront in progress

  6. #6

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    T.G.I.F.! - Slaphppy7   for providing sage tips to  and keeping up with -- so many - RiversGirl   Have a Angelfish for the advice on Dan's Journal, I can't rep you anymore yet :) - steeler58   You really need some discus :o) - fishmommie   A quick ninja penguin for you. - mommy1   
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    Default


    0 Not allowed!
    crunchy, I get annoyed with my old-school one for that exact same reason, but I'm actually reading the temp of the water coming out of the faucet for my water changes (using a siphon).

    I typically place my glass thermometer on the opposite side of the tank from where my heater sits. That way I'll know the distribution of heated water is correct.

    I've seen digital thermometers differ in readings from the old school variety, as well - same tank, different reading. I'm more akin to believing the old school one, because I never see variations of the same water with different glass thermometers. I'm sure they're reliable... just not "as" reliable. ;P
    Adventures in Aquaria - The KevinVA Story

    When in doubt, ask yourself... W.W.L.S (What would Lee Say)?

    Have a fish problem? Fill out and post this completed questionnaire in the General Aquarium Forum, when you start a new thread.

  7. #7

    Join Date
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    ٩(̾●̮̮̃̾̃̾)۶ - korith   For educating everyone on sumps! - ~firefly~   For your upcoming tetra school. It may say Neon but the red strip goes all the way forward hence Cardinal. - Strider199   
    Arthritis - Child Abuse - Colon Cancer - Colorectal Cancer - Dystonia - Education - Free Speech - Interstitial Cystitis - ME/CFIDS - Reye's Syndrome - Save the Music - Teens Against Smoking - Victim's Rights - Water Quality - mrramsey   Breast Cancer - Birth Parents - mrramsey   

    Default


    0 Not allowed!
    Yes it is pretty quick - maybe 10 - 15 seconds to stabilize.
    Mike
    120g Mixed Reef In Progress
    120g Reef Journal
    55g Freshwater - Out of Service
    My 55g Tank Remodel Project
    72g Bowfront -Out of Service

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