Here's why land isn't necessary for them:
* They are amphibians but not like other frogs: While some frogs have a land-based life stage, African dwarf frogs are fully aquatic throughout their lives.
* They breathe through their skin: Their skin is permeable, allowing them to absorb oxygen from the water.
* They can't jump: Their bodies are adapted for swimming, and they lack the muscles and structure to jump onto land.
However, while not necessary, some people do provide a small area of land for their frogs. This is mainly for decoration or to offer an area for basking, which they don't actively do.
If you do provide a land area, it is crucial that:
* It is easily accessible: Make sure the frogs can get on and off the land easily.
* It is not too large: They will likely just sit at the edge of the land area if it's too big.
* It is made of a smooth, non-toxic material: Avoid anything rough or potentially harmful for their skin.
Ultimately, a properly sized and filtered aquarium with plenty of water is the best way to provide a comfortable home for your African dwarf frogs.