Whats more accurate

[Zoaelite]

Originally Posted by Snaz

You need a third fourth thermometer to ID the suspect.

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

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.