If your finding it difficult to keep your day and night temps stable you need this upgrade.
Thermostatically controlled heat mat. 
Simple to use. 
Just plug in and set the desired temperatures and this little heat mat will maintain the perfect substrate temperature.
The thermostat has a digital display.
Temperature probe
1m Lead length
The Team set the temps to come on at 26cand off at 27c
Sellotape the temp prob to the heat mat so it will not fall off. MAKE SURE TO STICK TEMP PROBE TO ONE OF THE BLACK SECTIONS ON HEAT MATT.
To change the temperature settings please follow below:
Press and hold left hand arrow for 3 seconds and use the up and down arrows to change to the ON temp. leave for 5 seconds.
Press and hold the right arrow for 3 seconds and use the up and down arrows to change to the OFF temp.