Mar 7, 2017 #1 S Sumino Arachnopeon Joined Jan 18, 2017 Messages 18 1.Can mantis ooths withstand minus 10 degrees? 2.The room temperature image is 20 degrees. Will it take days to hatch? 3.What is the optimal temperature for hatching? And how long does it take to incubate at the optimal temperature?