I'm running between 27.7 & 27.9. The high temp is to keep my discus happy,
mine too I prefer cooler but the t5's keep it warm.Thermostat set at 22c but often will be 24-25C.
My wife just asked me why its so cold in the house "I lowered the temperature to try and cool my tanks"I target 24C but due to the heat trap that is my house, for most of the year I can achieve that without any heating. Last night was getting a bit better, recording an air temperature low of 20C.