I figure this is a good way to get the conversation going.
We currently have one community tank with a dwarf gourami, corydoras, neon tetras, a small colony of cherry shrimp, an assassin snail, and a plague of ramshorn snails that hitched a ride on some water lettuce we bought a few years ago.
2.65 gallon: moon jellyfish
3 gallon: shrimps and snails
20 gallon: tetras, corys, upside down catfish, siamese algae eater (eventually going to other tank), yoyo loach (also bound for other tank if it outgrows the 20), plecos, just had a mystery snail clutch hatch successfully, shrimp
75 gallon: dojo loaches, angelfish, plecos, a panda cory, pictus catfish, synodontis that thinks he’s an upside down catfish, peacock eel, mystery/narite/rabbit snails…loaches ate all the shrimp in Phishadelphia (where it’s always sunny).
21 gallon salt water: clownfish, firefish, diamond goby, lawnmower blenny, lettuce sea slugs, rockflower and bta nems, peppermint shrimp, turbo/snails galore, tiger conch, assorted corals. These are all bound for the 120 reef tank we’re designing.