The Oliver Knott AquaEarth Soil at 6 litres is the Number 1 fertile substrate for powering aquatic plant growth, featuring a secret blend of Japanese volcanic ash, clays and minerals that controls the water hardness in addition to making a perfect bed for aquarium plants.
AquaEarth can be used as stand-alone substrate.
We have been using AquaEarth as in our planted tanks for many years and it has not disappointed us. We recommend this product as it just works.