For two crabs you’ll need 20 gallons of aquarium space. Mostly everything on Amazon is a bundle for fish, so it comes with stuff like the filter, heater, etc which those you don’t need. I know petco and petsmart both have just regular glass tanks with nothing else, and both of them sell glass lids as well to fit the tanks!

As for toys: a bunch of people’s (mine included) crabs like the coconut huts, cholla wood, and also things like hammocks and vines for them to climb on.

Yes! Sorry it took me so long kathson 3 PCS Reptile Vines... https://www.amazon.com/dp/B08T5V4QQY?ref=ppx_pop_mob_ap_share

PINVNBY Bearded Dragon Hammock... https://www.amazon.com/dp/B07HFT3C78?ref=ppx_pop_mob_ap_share