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a holding tray
When placed in water
Can be positioned vertically or horizontally
The RIO 180 is the second from smallest aquarium in the RIO range
Velda Classic Substrate Pond Gravel Select:20kg/20L a holding trayClassic Substrate from Velda is the standard for a biological nutrient medium for garden ponds. Owing to its very light and porous structure, this substrate provides maximum adherence of micro organisms. Clear water guaranteed! To obtain a natural and stable balance in garden ponds, the substrate is important for the development of micro organisms. Also, the material should contain a sufficient amount of nutrition for the growth of pond plants. With