Petzlifeworld Natural Volcanic Lava Rocks Sand Planted Substrate (Black, 3 kg) River Rock Planted Substrate(Black, 3 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.
