Both the goldfish and the beta are popular choices for pets, and both are believed to be a low maintenance pet. So, which makes the better pet?
The goldfish is the most common pet in the world. It requires a tank, but never a just a small goldfish bowl or small container. Like all other fish, it requires oxygen, and the goldfish gathers oxygen from the surface of its home. Surface area is the important thing in providing enough oxygen for your goldfish.
Although hermit crabs may be purchased in tiny terrariums, they require a much larger habitat to live comfortably. A hermit crab will be fine in a 10-gallon or larger aquarium. Line the bottom of the tank with sand or stones, so your pet(s) have an easier time walking around.
Two shallows dishes of water are required - one filled with salt-water and one filled with dechlorinated fresh water. Additives can be purchased at pet stores to be added to water for each of these. Having sponges in each dish works well in helping hermit crabs obtain the water, and in adding humidity to the habitat. It’s a good idea to place the water dishes down into the substrate (gravel, sand, etc.), to prevent the crabs from knocking it over while they may attempt to dig under or climb over the dishes.