sawasdee krub
keep
C. ligniperdus and
C. herculeanus without any heater, just the temperatur of your room.
keep it too warm, and they will finish the summer very soon and celebrate the hibernation

so some years ago iam proud to watch a "sleeping"
C. ligniperdus in August
with
Messor barbarus: dont forget, the ants live not open on the gound.
you think inside the nest we will found 28°C???
better take moderate temperatur and you will enjoy a stable, health colony!