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It is Reuse, Environment, Easily product.
There are some fodder and excreta in the
bottom of fish bowl,if don’t clean it,there willbe Toxic Ammonia and nitrite in it.
There is a convection tube in the fish tank When pour into the fresh water ,by water convection , the dirty of the bottom will convection to out of the fish bowl and provide nutri-ent for plant.
It is not use electricity also can keep it clean by easily physics.
National Taipei university of technology