Aquarium water circulating system - has filter screen beneath sandy floor

摘要

The aquarium incorporates a water-circulating system. This consists of a pump which draws water out and returns it under pressure. The suction tube (18) for the pump is connected to at least one filter screen (20) arranged beneath the surface of the sandy floor (12) in the aquarium (10). USE/ADVANTAGE - The water circulating system prevents fouling of the sandy floor of the aquarium without any attendant disadvantages.