overflow for nana tank

VIV OVERFLOW innovation with design, quality and functional NO complicated overflow space so layout your aquarium as you like! Improve and stabilize the quantity of water. Connect one aquarium to another and increase the quantity of water. Stabilized and provides better aquarium environment when the water volume increases. Just hang up to a main tank and easily starts the system. Helps to remove grease on the water surface. Starts automatically. (Reset automatically after a power cut or even wh…

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