Using this terrarium moss is super easy. Just place it in your 5 - gallon tank where your amphibians or reptiles live. It'll help keep the environment humid. When using it as an egg - laying or incubating medium, spread it evenly. Make sure to check the moss regularly. If it starts to look dry, you can mist it with a little water to keep it moist. Also, keep an eye out for any signs of mold. If you spot mold, remove the affected parts right away. This way, your pets will have a clean and comfortable home.