Aquarium tercera conca von lomarraco (4)

4mm glass basin, put together with black silicone, bottom frame made of black aluminum without a cover. Rear wall: volcanic rock of approximately 2 cm with blond peat fixed with silicone in the front. The volcanic rock is combined with quick cement on the back and rigid green plastic mesh. We want to highlight that the main advantage of volcanic rock is its high porosity that allows the establishment of a good bacterial colony. It has the disadvantage that it is very rough and can [...]