Try this small “Bottle biology” unit for fast results. This unit makes it possible to create and study a completely closed terrestrial or aquatic environment. Place a few small potted plants in the box and obtain reliable results within a short period of time. The rubber lined acrylic lid and the sturdy foldback clips ensure a complete seal of the fauna box. Two large sensors (for example CO2- and O2-sensors) and one small sensor (for example temperature sensor) can be connected via three holes in the lid. Holes are sealed with the enclosed rubber stoppers when not in use.