Hi Belle,
My brisbane carpet has been hanging out in his water bowl a bit the last 2 weeks.
He is in outdoor enclosure and the temps up here in brisvegas are getting up to mid 30deg.(It's bloody hot and sticky)
There are no sign of mites so i am gathering he is bathing in the cooler water.
How hot is it down in Sydney at the moment?
Could this be cause for him laying in the water.