ive had my mantis in his tank for about 2-3 weeks now. hes doing pretty well, has been building himself a nice burrow. i bought him 3 snails to eat because he hasnt been taking too well to the frozen food. he hasnt killed any of them. i dont want him to starve, what can i get him that he will eat? hes a pretty small mantis shrimp though, maybe only an inch or so.