Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > General Hardware/Equipment Discussion

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 10-03-2008, 09:06 PM   #1
Aquarium Advice Apprentice
Join Date: Jul 2008
Posts: 41
Thermometer inaccuracies?

When I started up my 5 gal nano, I had a (I think Therma-Temp) alcohol thermometer, which always seemed to read high in the past (when it was in my 5gal)

Name:   Therma-Temp Thermometer.jpg
Views: 114
Size:  21.9 KB
For my 44 gal I got a Coralife electric thermometer, but I think it's reading low...
Click image for larger version

Name:	Coralife Thermometer.jpg
Views:	51
Size:	79.1 KB
ID:	15476
I also got one of the stick-on strip thermometers to put on my 5 gal, which now sticks on the side of my 44 gal.
Click image for larger version

Name:	Aqua Culture Thermometer.jpg
Views:	64
Size:	25.2 KB
ID:	15475
Currently, the chiller is set to keep the water at 79 degrees, the alcohol thermometer is reading 79 degrees, the Coralife thermometer is reading 75.5 (And 188.8 if I jiggle the wire near the base), and the stick-on strip thermometer is reading 78
When I first got the Coralife and the alcohol thermometer, I calibrated them both by sticking them in ice water, and both read 32F
I'm guessing the temperature is around 78-79 (2 outta 3 ain't bad)
Anyone have good or bad experiences with any of these thermometers? Could a low battery cause the misinformation on the Coralife?

My 44 SW Hexagon Mixed Reef
Claw Atticas is offline   Reply With Quote
Old 10-03-2008, 10:33 PM   #2
Aquarium Advice Addict
SpeedEuphoria's Avatar
Join Date: Jun 2008
Location: BCM
Posts: 1,225
My coralife thermometer does the 188 thing when it 1st turns on(max it will read). The if you touch/move it, it does it. Its b/c the battery is held in with that cover so if you press on that cover it loses power/resets.

Other wise mine seems to read OK according to my other thermometers.

I would agree with you that your sitting around 78-79 deg

10G,Planted- Endler's Livebearers+RCS, 55G,planted
Originally Posted by Kurt_Nelson View Post
Understanding the basics will let you make informed decisions on what advice to follow, and what advice is just plain hooey!
SpeedEuphoria is offline   Reply With Quote
Old 10-03-2008, 10:58 PM   #3
Sliced Bread
neilanh's Avatar

Join Date: Dec 2006
Location: Northern Virginia
Posts: 8,482
I've never found a digital thermometer that I trust for absolute temperature. Use the mercury.

I do, however, use the digitals to make sure the temp doesn't change. i.e. if I know the water's 78, but the digital reads 75, as long as it stays 75 I'm good.
In the DC Metro Area? Check out GWAPA and WAMAS
neilanh is offline   Reply With Quote
Old 10-10-2008, 09:29 AM   #4
Aquarium Advice Activist
OldMan's Avatar
Join Date: Oct 2008
Location: Central Illinois
Posts: 137
An approach that I use is to go to the LFS and look at all the alcohol thermometers that they have. If I need 3 I get the 3 that are closest to each other. They are all in the same room and the same atmosphere so their temperatures should be dead on each other if they are accurate. It is not unusual to find some in each batch that are much higher or lower than the rest so I figure I am getting the best I can find by getting the ones that match. The room temp in the LFS is often not much different than a typical fish tank so I am checking them at a temperature that I will be using, not at 32F. The digitals are subject to drift with age of the components, drift because of battery running down and calibration errors that are as big as the ones the alcohol ones have
OldMan is offline   Reply With Quote


Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
thermometer copi Saltwater Reef Aquaria 6 11-09-2006 09:39 AM
Thermometer inaccuracies.... Lonewolfblue Freshwater & Brackish - General Discussion 6 10-31-2005 08:45 PM
Thermometer hb3133 General Hardware/Equipment Discussion 15 07-19-2005 02:05 PM
My thermometer Rudy_627 Freshwater & Brackish - General Discussion 21 02-23-2005 05:37 PM
Thermometer??????? Hookman Saltwater Reef Aquaria 6 09-07-2004 11:04 PM

» Photo Contest Winners

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 12:47 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.