Aquarium Soil is used for planning a new aquarium. It is a complete bottom layer, which can be used without any other types of bottom layer see how to use it here. Aquarium Soil is a complete bottom layer, which can be used without any other types of bottom layer The grain size of 2-3 mm makes it easy for planting Aquarium Soil ensures proper growth and stimulates red colours How to use the product Aquarium Soil ensures good and active growth from the beginning, and boosts the red plant shades. It is a complete substrate, which can be used without any other types of bottom layer. Aquarium Soil is further an active bottom layer that lowers the pH value and slightly affects the water chemistry. We recommend that you change 25-50% of the water min. twice a week during the first 4 weeks after establishing the aquarium. How do I calculate the quantity of Soil or Soil Powder needed for my tank? Measure your tanks length and width in cm, for example 90 x 60 cm. Consider the thickness of the bottom layer you want, e.g. 8 cm. Make the layer thicker towards the rear wall for a great visual effect! The calculation to do is length x width x layer divided by 1000.