Trigg Island Silver Salties Swim for Fitness is a free program, thanks to the City of Stirling, supporting seniors in the community to stay active. If you enjoy swimming, enrol now! Each Wednesday in the indoor pool at Terry Tyzack Aquatic Centre, you will be coached through a program and given guidance on stroke technique. There is no charge for the program or for pool entry thanks to the City of Stirling grant received by the Trigg Island SLSC.