Whether there are any crabbers from Singapore,I wanted to start this post because i can still remember that it took me almost forever to search the internet on where to buy crab supplies in Singapore as Land hermit crab's aren't exactly popular pets here,so this post will hopefully help
Future Singaporean crabbers,
General Questions Singapore Crabbers may ask.
-Why buy a Land Hermit Crab in Singapore?
Ans:Hermit crabs make great pets especially in a warm and humid country
like Singapore,we have the perfect weather for Hermit crabs,If u have asthma and cannot keep dogs or cats,Hermit crabs are the next best option,Since we can't own any reptiles except the malayan tree frog or turtles,these are the next best interactive Pets!They are adorable and make unique pets that have the "wow"Factor.
-Where do I buy a hermit crab?
Ans: There are 4 places that sell Hermit crabs in Singapore
1.AMB aquapets hub($18 for small,$25 for medium,$35 for large and $50 for a jumbo)
•Novena square(Next to Harvey Norman)
•Plaza Singapura
2.Petmart($10 for 1 crab,no matter the size)
•Serangoon
3.Polyart Aquarium(unsure of price,Sorry)
•Clementi Avenue 2
•For more information search on google the name of the pet shop
-Where do I buy crab supplies?
•The pet shops above should sell everything needed,except sand,Sand can be bought from FarEastFlora garden,it's playsand it comes packaged like this

Feel free to ask questions and comment!
For more info on How to care for land hermit crabs,Read this: http://hermitcrabassociation.com/pages/
Thanks to stevenc on where to buy the sand!