Hey just got a beautiful little Clowknife and hes not eating. So far I have offered marketshrimp, pellets (sinking), ghost shrimp, blood worms and guppies. He is looking pretty thin and is kinda acting lethargic. Any ideas? I gave him all these foods with the lights on and when off to see if he was just nervous. He is not hiding either, the knife swims around the tank but in a lazy way. 