It's finally stopped raining, so I was able to pick up a few leaves to add to my little betta tank!

But now I'm not exactly sure what to do with them...
Do I need to do anything special to oak leaves before I add them to my tank? I was advised to add some leaves to my tank to help my betta's fins (thanks Oldfishlady!

) but I am not sure how to prepare them...
Should I rinse the dirt off of them? Do the leaves need to by dry before adding them to the tank? How many leaves per gallon and can I reuse them after a water change
Thanks in advance for reading my post and giving advice!