Welcome to the Fitbit Community, @docginger.
Thank you for your question.
Currently, you can track swims with your Fitbit Versa 2 by following these instructions.
Water Aerobics cannot be recorded by your watch, but you can manually log the activity on your Fitbit account. For instructions please visit this article and open the menu "How do I manually log exercises in the Fitbit app?".
There is a feature suggestion to add Water Aerobics to the list of Exercise Shortcuts. You are welcome to vote this idea and once any update be available it will be communicated as soon as possible.
See you around.
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