Our terrarium has a rock, twig, leaf litter, cricket, worms and grass.
The lowest piece of grass is 2 centimeters and the biggest piece is 18 centimeters. A week later, our worms and fish died. Now all we have for animals is a cricket.
The grass realize on the water to grow.And without crickets the grass would get to high. and the worms used to help the dirt produce the grass.