Use of Tropica Plant Substrate:
The substrate is laid in a 1 cm thick layer on the bottom of the aquarium, when the aquarium is built. A layer of gravel of minimum 3-4 cm thick is then laid over the substrate. The gravel acts as a barrier between the concentrated Tropica Plnat Substrate and the water. Plants are planted in the gravel in the normal way and new roots quickly form in the substrate. When planting, disturb the substrate as little as possible, to avoid clay and sphagnum particles being mixed into the water. If plants are to be removed from the aquarium, cut the plants at the plant/root transition to avoid the plant substrate mixing with the water. Plant roots are left in the bottom layer. They are quickly broken down, so providing nutrition to other plants in the aquarium.