I am having trouble getting the temperature up to where it needs to be in my 20L. I was using a reptitherm uth rated for 10-20g but it only got the temps up to the mid 70s. So I took it back and got the one rated for 30-40g and the temperature is right around 83 and thats on the warm side but on the cool side its in the low 70s. I have a thermometer with a probe and these temps I took were right on the substrate. I stuck the probe down into the substrate on the warm side and it gets up into the 110 area so I know its working. I have about a 2" layer of aspen. What can I do to get the temps up? Should I get a different substrate or take some of my current one out? Should I get a light but what would I do at night when I have to turn it off?
thanks,
steve