Quote Originally Posted by kitedemon View Post
You are still talking about the average of the lowest temperatures an the highest temperatures. This is not realistic, only looking at the maximums. You are saying the extremes are what you should be looking at not the averages of the whole day. Lets look at this, for the warm season if we take the average of the daily maximum temperatures recorded, 94ºF and the average of the lowest temperatures recorded 69ºF 94+69=163 /2 = 81.5. This is not a true daily temp average but is likely close. Better than saying the average of the coldest temps recorded is correct.

Are you also suggesting a 91ºF ambient is acceptable as well?

You need to look at the daily temperature average not the average of the daily extremes.


Humidity is hardly cut and dried. You stated it is harder to keep humidity if the ambient are temp is higher. This is not correct it is easier, you need less RH because the saturation value is different. This does not ever change in a tank, house or outside. It is a law of physics. The cooler the enclosure the harder the humidity issues are.

If you did keep a royal at 64ºF you could never get enough humidity as 100%RH fully saturated air is less than the amount of water in the air that has demonstrated over and over to produce good sheds. 60%RH only works at one temperature 80ºF as the ambient changes so does the needed RH. The cooler it is the more you need the closer you get to 100% the harder it is to hold. Warmer air temps need lower % of the saturation point and it is easier to maintain.

Warmth evaporates more water. Cool temperatures evaporates less. Basic physics, you have suggested this is not true.

The explanations of calculating temperature averages are starting to give me nightmares about bell curves, standard deviations, and T-tests from my old stat. class!

I think there may be a miscommunication over the humidity argument, and you're arguing a similar point. It seems like some people are arguing physics (warm air evaporating water more quickly than cooler air) while OP is arguing that in glass tanks humidity is harder to maintain due to the lids, and higher temperatures allow the tank to dry out faster. So in glass tanks, lower heat = slower rate of tank drying out/slower rate of evaporation. It's not that warmer temps lower humidity, it's that they generate humidity too quickly to properly maintain it without constant misting.

So let's say there are two 10g tanks next to each other with screen lids. If the tanks had the same amount of damp substrate and type of heater (be it CHE, lamp, or RHP), but one was set to an ambient 72F and the other is set to an ambient 82F, which tank would have more consistent humidity within the desired parameters for BPs? Which tank would hold humidity longer? A tank too warm may have the right humidity level but it would evaporate completely within a day. A tank too cool would have damp substrate for a week but very little humidity in the air. What the optimal temperature range for the right humidity level for the longest period of time?