Welcome to Kansas. There is a fish store on the east side of Manhattan. It's on a road that precedes I-70, going east toward to Topeka. It's fairly decent, not a lot of plants though. Lawrence has a really nice fish store, PETWORLD; a knowledgeable staff and robust variety of fish, poor plant selection though. Petland in KC is probably the best place to buy live plants in the Lawrence/KC/Topeka regions.