...when you need to knock out your fish before moving them.
...when the first thing you say after your friend asks you, "How are things?" is "Well, one of my fish won't eat pellets yet."
...when friends who aren't into fish keeping at all always ask, "So how's such-and-such fish doing?"
...when you've sacrificed almost half of the square footage in your tiny room for a huge cattle trough fish tank.
...when your fish get to enjoy toasty 79F water, while you freeze your butt off in your cheap, uninsulated house.
Ahh, the story of my life.