Antionette Neamt was the star performer at the Irish Short Course Championships in Lisburn on Sunday.
The 13-year-old smashed the Irish senior 1500m freestyle record, knocking almost eight seconds off her previous best to win in 16:40.73.
Larne pair Danielle Hill and Conor Ferguson added to their 200m backstroke titles they won over the weekend with victories in the 100m backstroke.
Lisburn's Bethany Carson won all five events she competed in.
Tallaght swimmer Neamt deservedly won the "Swimmer of the Meet" award with an Irish senior record, two Irish junior records and three national titles.
Emma Reid, from Ards, was also in record breaking form as she set a new Irish junior record of 27.77 in the 50m butterfly final.
Bethany Firth won the race in 27.46 to pick up her third gold medal of the meet.
In the men's equivalent Jamie Graham secured his fourth gold medal with a time of 24.75.
Carson added the 200m freestyle to the 100m freestyle, 100m butterfly and 100m and 200m individual medley titles.
Ards swimmer James Brown put in a strong last 25 metres to win the men's 200m breaststroke final in 2:20.55.
Brendan Hyland broke the 200m senior butterfly record for the third time in four weeks on Saturday, his time of 1:57.82 taking 0.7 seconds off the previous best.