My bullhead catfish wont swim around or eat?

Hi everybody i just bought a spotted bullhead catfish. I have had him for two days now in a 20 gallon with cichlids and rainbow sharks. his whiskers on his nose are getting shorter and he will not swim around or eat anything what do you think this could be? it has a 30 gallon filter and a bubble wall with plenty of air. also plenty of live plants please help?! go to youtube and type in cichlids bullhead catfish angelfish and puffers the first video should be my tank its 3 min 9 seconds Thank you!