I have to be honest here and say I really hated this episode. I'm glad season 9 finally got a week of new episodes like I was hoping, but this episode was not a great way to start the week off.
I liked the beginning when Sandy was on the bus trying to observe the residents and SpongeBob and Patrick acting "natural"... and that's about it. The rest of this episode was really lacking in funny jokes and humor, and didn't much substance, but that's not my main problem with the episode. My largest problem with the episode was Patrick. He was extremely unlikable in this episode, I could not believe it. He was acting like a huge jerk to SpongeBob by pushing him around, mixing up the sand, and eating his ice cream. Wow! This just feels like the unholy child of Rule of Dumb (a good episode) and Yours, Mine and Mine (my least favorite episode)! And all because he was told he was "in charge"? No, that doesn't work here.
Do you want to know why it worked in Rule of Dumb? Because SpongeBob told Patrick that a king can have whatever he wants, and then it went to his head due to him taking it too literally. In this episode? He acted like a jerk just because Sandy said he's "in charge". And apparently he thought that being "in charge" means being a bully to your best friend. And, no! Patrick feeling bad for himself does not save the episode or excuse what he did. And SpongeBob said that it's the experiment's fault. Um... no, No, NO! That was on Patrick. He chose to be a jerk. It does not work here.
And what's with Squidward in this episode? No, not his "torture" in this episode (come on, people. He wasn't "tortured" here), and he wasn't unlikable here, but why was he acting like a child in this episode over ice cream? That's not like Squidward at all. Was this just a poor build up to the episode's lame ending? I don't know what they were going for.
Overall, as much as I hate to say this, The Fish Bowl was a huge mess. Patrick was a jerk, Squidward was out of character, the humor was lost, and the ending was lame. And that's a darn shame because late-season 9 was doing so good, restored my love for Patrick with What's Eating Patrick, and then this episode comes along and ruins everything. Come on, writers. Please do't go back to making Patrick a jerk. I know you can do better than this.
The Fish Bowl gets a 2/10 from me. My least favorite episode of the post-sequel era so far, and my second least favorite of season 9 as a whole, behind Little Yellow Book.