You know you're a fishkeeper when...
You seriously consider adding dechlorinator to your pitcher of iced tea to cut the city water flavor.
You wake up in the morning and first thing you do a gravel siphon, then later as you're brushing your teeth you realize you forgot to wash your hands and it doesn't bother you.
You email a complete stranger who's an artist and commission a portrait of your favorite pet shrimp, Bruce, to hang on the wall of your living room because that particular spot is too small to fit in another tank.