"Splash 1 (Now I'm Home)" is a 1966 single from the band 13th Floor Elevators from their album The Psychedelic Sounds of the 13th Floor Elevators.
It was a minor regional hit in Texas but became a bigger (albeit still relatively minor) regional hit a year later when covered by the Clique.
It has also been covered by Bongwater and The Mighty Lemon Drops.