EVERYTHING ABOUT MOUNT GAMBIER BLUE LAKE

My spouse and I are frequent divers. We all know if you need to snorkel / dive at Pincanninie Ponds You'll need a allow. Is it possible to dive inside the Blue Lake? If so wherever is the best entry point etcetera?You will be in the middle of Winter season in July, Therefore the Blue Lake is most probably to be a darker steel grey colour at the mom