Petzlifeworld Natural Volcanic Lava Rocks Sand Planted Substrate (Black, 1 kg) Laterite Planted Substrate(Black, 1 kg)
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1) Remove nitrates from water. 2) Increase oxygen in water. 3) Acts as a natural cave option. 4) Can be used to tie down plants. Ideal for Planting in the Aquarium. Handpicked specifically. These are natural rocks and hence no two rocks will look similar. Natural – Colour may vary from Grey to Black. Size / shape of each stone is unique and different.
