is one piece episode 30 filler?

After expelling the Krieg Pirates, Luffy asks Sanji to join the crew, to which he refuses. Still, Sanji mentions his dream of locating the All Blue, a mythical ocean where all four seas meet.

Zeff overhears this conversation between Sanji and Luffy. The restaurant staff taste Sanji's soup, and Patty, Carne, and Zeff all pretend to dislike the soup to prompt Sanji to set sail with Luffy, and Sanji leaves the dining area in anger.

Zeff reveals his true intentions to Luffy, and Sanji overhears this from outside the restaurant. He finally agrees to join the crew as their cook.