An entrance hole of approximately 2.5 cm in diameter is drilled into the side of the shell.
Water is replaced as necessary.
Implementation Species Poison Arrow Frog. Purpose Provides a darkened area containing stagnant water in which to lay eggs. Acidity of water is maintained as area is covered, preventing dilution by fresh water. Advantages Easy to make and replace. Localises area in which eggs are laid facilitating process of removal for incubation.