ive had him for about 4 months now. his normal color is a deep royal blue but now he has turned to a greyish light blue color (ugly)
and he doesnt go to the top of the tank anymore
he just stays there floating at the bottom. he hasnt been eating either =/ he's been like this for about 2 days now. i feed him regularly and clean his water also.
whats wrong with him and what can i do to help him??
and he doesnt go to the top of the tank anymore

whats wrong with him and what can i do to help him??