The quartet of Tao Li, Samantha Yeo, Quah Ting Wen and Amanda Lim blitzed the competition to win the SEA Games women's 4x100m medley relay, Singapore's only title from the pool on Sunday night.
Russell Ong delivered silver in the men's 50m freestyle, clocking 23.14 seconds. He finished behind Indonesia's Triady Fauzi Sidiq, who set a new meet record of 23.12.
Singapore's Darren Lim, who had been touted a challenger for Ang Peng Siong's 1982 national record of 22.69, could only manage fifth position with a time of 23.58.
In the women's 200m freestyle, Quah and Lynette Lim won a silver and bronze respectively. Their times of 2:01.74 and 2:02.62 put them behind Thailand swim queen Natthanan Junkrajang, who clocked 2:01.03.
Samantha Yeo clinched her first medal of the Games in the women's 200m breaststroke, when she clocked 2:34.27.
Teo Zhen Ren failed to retain his title in the men's 1,500m freestyle, finishing fifth with a time of 16:10.97.