hey i got a snowflake eel awhile back and hes getting bigger i can tell anyway and he doesnt want to leave his hole and i think hes getting to big i mean he'll leave but only for a second and gos back anyway i think its getting to tight and making him sick and he throws up the legs of the frozen krill i feed him why what can i do is there anything i can buy him to incourage him into leaving his hole and go in something else please help thx!