Cameron van der Burgh cruised to a sterling finish in the 100m breaststroke, clocking a Fina World Championships qualification time of 59.73, while Daniel Swanepoel (18), Bryce Skea (17) and Michael Houlie (16) all confirmed their Junior qualification times.
The silver in the event was claimed by Alaric Basson in 1:02.62.
Myles Brown was on top of the world in the 200m freestyle semifinal, as he posted his first Fina World Championships qualification time of 1:47.51, to the 1:47.73 requirements and overtook Chad le Clos, who finished second in 1:49.47.
Jarryd Baxter (18), who finished third, scooped his second Fina Junior World Championships qualification time in 1:49.79 and Timothy Sates (18) added his name to the list in 1:52.94.