on amazon there is tubes of assorted crab food that isnt toxic and there is a ton of stuff on etsy!!

here is the amazon link: 4 Pack Hermit Crab Food - Proteins, Minerals, Fats, Color Enhancers - Large Pour N’ Go Food Tubes https://www.amazon.com/dp/B07NCT4MXJ/ref=cm_sw_r_cp_api_glt_fabc_SJ2AWYEN8JV79YNYYHF7?_encoding=UTF8&psc=1

also definitely give him a buddy!