every fish makes sounds, or as you say clicking noises (lol), these sounds are very normal. the noises Tucker is making is him trying to eat food hes opening his mouth trying to get food. thats the sound, the reason he has been "going" too much is because either he is unhappy or you have been giving him too much food. your fish can be unhappy. It is a strange fact that when fish get unhappy or angry, they "go" alot. this is funny i know! lol! but is true. He mabey unhappy because you either have been keeping a bright light under him, tapping on him tank too much, or havent been feeding him enough food. you may think fish dont have any feelings but in some ways, they are jst like us. i hope this helps and i hope he feels better.