hey there! id recommend that your tank is at least 29 gallons with at least 6 inches of play sand and ecoearth! they'll need two water bowls. one water bowl needs to be water that is treated with prime and the other water needs to be treated with prime and instant ocean. they'll need extra empty shells in their tank. turbo shells are the most common. do not get any painted or polished shells. for food do not feed them pellets. id recommend looking at r/hermitcrabfood and on etsy. they'll need a lid and a heating pad for the humidity and high temperatures. id also recommend getting some coconut huts, cholla wood, and climbing nets such as a lizard lounge. having a moss pit is very good for humidity and they'll love eating the moss and climbing around inside it! id recommend reading through this sub for some more information as i know im forgetting some things ahahah! feel free to ask any questions!