my tt eel i acting fine, sticking his head out of his hole like usual, and he still came out to eat out of my hand like normal, but his color has changed. where he used to be dark brown almost black he is tan, and where he used to be tan he is a pinky white. is he sick? i have been only feeding him krill, its all he will touch. could this cause the color change? the ground just thawed so i can get him worms now, would this help? what would you guys recomend i do?