Are these clownfish preparing to spawn? Normally they would just be doing nothing and swimming in place for a couple weeks, now they are active and doing this inside the pot.
Nice, that looks like the behavior I expect to see when my clowns are preparing for the next round of eggs. It is possible they are just cleaning up if that pot is very new - Keep your fingers crossed!
Edit: If you can feed them a bit extra without causing the stability in your tank to be compromised that would help as well. I feed mine far more than what is necessary, but my bioload is pretty light overall
Getting ready, problem is you don’t know when. Keep an eye on the females belly it’ll enlarge before she spans. If its her first time, may not be reL big difference