True temperature.

[misu]

Acroholic;555454 wrote: I use an infrared temperature gun to check the accuracy of the thermometers.

same here, it's fast and convenient. Around $50 at home depot

 

[enderg60]

misu;555517 wrote: same here, it's fast and convenient. Around $50 at home depot

or half that on ebay

yeah I use the glass suction cup one for accuracy and then check it against an IR one which i use to check the sump and frag tanks.

again, its not really what temp your at but the stability of that temp.

 

[Jaycen B.]

Or $22 for this bad boy. http://www.tropic-marin.com/web/english/produkte/thermo.htm">http://www.tropic-marin.com/web/english/produkte/thermo.htm</a>

[IMG]http://www.qualitymarine.com/Measuring-Equipment/Tropic-Marin/High-Precision-Thermometer">http://www.qualitymarine.com/Measuring-Equipment/Tropic-Marin/High-Precision-Thermometer</a>

 

[mikesommers]

I think Andy is trying to say that 80,81,82,84 what ever it be just make it be. Temp swings are the biggest killer. How hot do you think it is in the shallows of the reef at high on on the equator? I am sure the water is at least close to 84. If you 84 today and 78 tomorrow and 81 on sunday then you have an issue. For example I refuse to use heaters. My tank stays with the temp of the house and has for 6 years. Hmmmmm. My corals look fine. I keep my house at 74 as best as possible. I will add to this that my first reef tank was a 29 gallon (with no heater) so stability is the key IMO!

 

[weaglereefer]

The other thing is DO NOT CALIBRATE YOUR REEFKEEPER PROBE!!!

Use the reading and then adjust (in your head) for that. Calibrating the probe will lead to it doing funky things and giving false readings. If the RK probe says 80, and your thermometer says 82, then just know in your head that the RK probe is always 2 degrees lower than actual.