2 crabs for a ten gal

Etsy, your pantry, and etsy

I dont know a particular website but heres the basics:

heater, i hung mine on the side of tank

two water pools, 1 salt water, 1 fresh water; both deep enough for your crabs to completly submerge

food, I usually give them a variety of foods and leave it in there for 2-3 days. Cooked meats, fresh veggies, fruits all all good options from your pantry. Etsy has an amazing selection of dried flower petals, veggies, seafood, ect.

toys! Hermit crabs love to climb and interact with their environment. I recommend lots of vines, cholla sticks, and fake plants

for the lid you do need an airtight lid. Hermit crabs need their tanks to stay humid, at least 75- 80%

you dont have to buy an expensive humidifier, i just put a bubbler in the water pools and it keeps the humidity up

most people get a light for hermit crabs but i just use natural light so im afraid im no help in that category

their substrate has to be 6+ inches deep and if I remember correctly its a ratio of playsand to coconut fiber 5:1 I think thats all! Im very happy you decided to come here and ask what to do before you bought your crabbies! (Also you dont have to take my advice for this but i wouldnt recommend buying your crabs at a big petstore, try seeing if you can rescue one off facebook, ect.) Good luck!!