The week-long meeting ended on Thursday with sprint queen Cate Campbell setting the South Australia Aquatic and Leisure Centre alight with the second fastest 50 metres freestyle of all time.
Her time of 23.84 seconds was 0.11 seconds shy of Britta Steffen's 2009 world record which was set in a synthetic swim-suit that has since been banned.
It capped an outstanding week for 23-year-old Campbell who edged her sister and world champion Bronte who was a gallant runner-up despite carrying a shoulder injury.
The Campbell sisters, who have fought a thrilling duel in the blue riband event in recent years, are set to clash in the 50 and 100 freestyle in Rio in August while teaming up in a 4x100 relay team with strong claims for gold.
"It's great to be feeling like I'm back in full form and it's great to see Bronte swimming so well despite her rocky preparation," said Cate Campbell. "I feel like I've been really close to world records for a really long time now."
For the Rio 2016 Olympics, there is a strong blend of experience and youth in the squad of swimmers. The oldest swimmer is five-time London Olympic medallist Alicia Coutts at 28, while Tamsin Cook is the youngest female at 17 years old with five who are off to their third Games.