After 6 months of operation, my BH has 11 nests and 4 nest markings. It meet my expectation but the number could be more if there is no water issue. When I went in to my BH, I realized that my humidifier operate without water again. I quickly checked the incoming water supply. The water valve was opened as expected after I lock it with metal cover. So, I suspect the water tank could be choke somewhere.
When I checked my data logger temperature and humidity data, the temperature sometimes hit 31degC. I have called my consultant come down and take a look this weekend. Hope the micro condition is improve to the ideal conditions and more birds will come in.