Whats more accurate

[blaster]

So i have a pinpoint temp probe and a mercury floating thermometer.There is a difference in about 4 degrees.I don't know but i'm thinlikng the pinpoint is off and going to throw it out if thats the case.What are people's feelings about this?

[Zoaelite]

How old is the pinpoint? Also for the love of god if its actually a Mercury thermometer get it out of the tank!

Pretty sure its an OH one though, if so and its not damaged it should be bang on.

[blaster]

Pin point is brandnew.Floating thermometer is new also.I'm assuming its mercury.

[Snaz]

You need a third fourth thermometer to ID the suspect.

[Zoaelite]

You need a third fourth thermometer to ID the suspect.

+1, no doubt both of these will give you alternate numbers as well though :lol:.

Which color is the fluid in the thermo? If its red its fine.

[emerald crab]

Get a NIST traceable thermometer. Temperature is really important in a reef tank. When you spend thousands of dollars on livestock, there is no point to cheap-out on a thermometer.

[blaster]

What is a nsit thermometer?Actually i didn't think the pinpoint wasn't cheap

[emerald crab]

NIST=National Institute of Standards and Technology.
These are professional grade thermometers that have been properly calibrated.