Aqua Natural Galaxy Aquarium Sand is a premium quartz sand for use in both aquariums and terrariums.It is made from natural quartz sand and is safe for fish and plants.The sand is also very easy to clean and maintain, and it will help to keep your aquarium looking its best. All colours are natural and pure.All Aqua Natural substrates have been triple washed, kiln dried and are exceptionally clean. Sparkles underwater. How much substrate to purchaseFor a planted tank we suggest approx 5cm depth. Directions for useAll Aqua Natural substrates have been triple washed, kiln dried and are exceptionally clean.Simply rince before use.Spread substrate evenly and fill with water slowly.Once the tank is filled start your filter. Any cloudy appearance should clear within a few hours.For excellent plant growth it is recommended to spread a granule mineral fertiliser as a sub layer before adding the Aqua Natural aquarium substrate.