The substrate is an important part of the aquarium interior because a lot of animals dig in the ground to search for food. The plants also need a safe hold and have to absorb the food in the ground through their roots. Digging fish definitely need a substrate which is not sharp-edged. Undergravel heating can only be recommended for medium-fine to coarse substrates because water circulation cannot really build up in very fine substrates.
Rinse the substrate with tap water to remove any abrasion caused in transit. Put substrate on the nutrient substrate (JBL AquaBasis) to promote the plant growth (for for vigorous root development approx. 6-8 cm).
Substrate with 0.8 mm grain size for freshwater and marine aquariums and terrariums
Prevents injuries of the mucous membrane: coarse-grained, round-shaped natural sand is gentle on sensitive barbels. Ideal for digging fish, such as rays, kuhli loarch, catfish, etc.
Ideal for fish, invertebrates and plants: no unwanted pollutants released into the water.
Use: Spread substrate on top of the nutrient substrate (approx. 6 - 8 cm for plants). Well suited for undergravel heating cables