Male:
| Age: | Time: | Date: | Who: |
| 9 | 5:53.98 – SC | 01 / 06 / 2012 | Asher Huffen |
| 10 | 5:13.07 – SC 5:51.84 – LC | 01 / 06 / 2013 01 / 02 / 2020 | Asher Huffen Jack Welbourne |
| 11 | 4:33.90 – SC | 01 / 06 / 2011 | William Gayne |
| 12 | 4:22.00 – SC | 01 / 06 / 2012 | William Gayne |
| 13 | 4:12.93 – SC 4:46.31 – LC | 02 / 03 / 2013 01 / 02 / 2020 | William Gayne Reuben Fox |
| 14 | 4:06.84 – SC 4:43.12 – LC | 01 / 06 / 2014 16 / 07 / 2016 | William Gayne Luke Mitchell |
| 15 | 4:19.71 – SC 4:35.75 – LC | 01 / 06 / 2001 05 / 02 / 2022 | James Brown Reuben Fox |
| 16 | 4:19.71 – SC 4:44.16 – LC | 01 / 06 / 2016 29 / 04 / 2023 | William Gayne Reuben Fox |
| 17+ | 4:14.38 – SC | 01 / 07 / 2017 | William Gayne |
Female:
| Age: | Time: | Date: | Who: |
| 9 | 6:01.00 – SC | 08 / 07 / 2017 | Eve Turnbull |
| 10 | 5:14.78 – SC 5:55.68 – LC | 14 / 07 / 2018 18 / 07 / 2015 | Eve Turnbull Beau Cann-Livingstone |
| 11 | 5:00.47 – SC 5:15.16 – LC | 13 / 07 / 2019 01 / 02 / 2020 | Eve Turnbull Pippa Hickman |
| 12 | 4:44.30 – SC 5:11.22 – LC | 01 / 06 / 2011 21 / 01 / 2017 | Eden Mitchell Beau Cann-Livingstone |
| 13 | 4:49.06 – SC 4:56.56 – LC | 16 / 07 / 2022 05 / 02 / 2022 | Emma Rann Pippa Hickman |
| 14 | 4:47.37 – SC 5:03.29 – LC | 12 / 03 / 2022 04 / 02 / 2023 | Eve Turnbull Emma Rann |
| 15 | 4:40.75 – SC 4:41.21 – LC | 17 / 06 / 2023 03 / 02 / 2024 | Eve Turnbull Pippa Hickman |
| 16 | 4:46.79 – SC | 01 / 06 / 2001 | Katie Loker |
| 17+ | 4:44.08 – SC | 01 / 06 / 2002 | Katie Loker |