Great product and perfect for my new crabitat build. It can be difficult to find the larger tanks in pet stores and we drove from Memphis to Birmingham to pick up - thanks Reef Life! We wanted this tank specifially and needed one NOT drilled. Hermit crabs need 10g per crab in the base tank and you can add upside down terrariums to aquariums for additional climbing space. Love Crab Central Station's Youtube video on toppers.