Absolute+ Reptile Bio-Tope Spray 100ml with Concentrated Live Microbe Culture. Microbes in the soil are directly tied to nutrient recycling especially carbon, nitrogen, phosphorus and sulphur. Bacteria are a major class of microorganisms that keep soils healthy and productive. Bacteria are tiny one-celled organisms generally 4/100,000 of an inch wide (1 µm). A teaspoon of productive soil generally contains between 100 million Microbes and a billion beneficial bacteria. Bacteria are the smallest and most hardy microbe in the soil and can survive under harsh or changing soil conditions. This Culture will keep soils Fresh and healthy. Can also be added waterfalls when using false bottoms in the terrarium. Absolute Live Microbe Culture Startup can bring any planted biotope setup to life for use in bio-active biotope displays, planted paludariums and vivariums.