100% natural black soil is used as raw material. It is perfect for creating an underwater landscape that is very close to the South American rainforest. It offers a high humic and nutrient content and is also suitable for harder tap water.

A high pH value of the soil substrate makes it difficult for aquatic plants to absorb nutrients. Substrates from the aqua soil reduce the hardness of the water and lower the pH to a level where most aquatic plants can absorb the nutrients they need for thriving.