Minimum Temp

[Pheonix]

Today is particularly hot here in Darwin and my tank is sitting at 31.9 on my digital thermometer(do these need calibration if you haven't used them in a while) I was considering getting a chiller to maintain at 30, any ideas about this? During the dry season which is nearly upon us the tank will sit comfortably at 28-29 but in the wet temps are unpredictable

[ILLUSN]

should be fine, i wouldn\t chill a discus tank, just leave the lids slightly a jar and keep up the airation.