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03-06-2013, 12:33 PM #1
Thermometers - Digital vs Old School
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?
03-06-2013, 12:51 PM #2
I use old school glass thermometers in all of my tanks. They haven't failed me yet.
03-06-2013, 01:17 PM #3
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?46 gal fw tank with black skirt tetras, neon tetras, spotted corys, cherry barbs, otoclinus, snails & 4 amano shrimp - plastic & live plants
5 gal QT
Remember: Our job is to take care of the water our fish live in
03-06-2013, 01:50 PM #4
03-06-2013, 02:08 PM #5
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
10 gallon live planted aquarium with 6 neons
90 gallon fw community in progress
03-06-2013, 02:57 PM #6
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
03-06-2013, 02:58 PM #7