Eco submarine / clean water filter

Contaminants flowing in the circumfluence such as floating bacteria,
dust and grease get inhaled into the filter of the eco submarine
through the round surface. Then purified water is sprayed out as the
power of cruise. Rotatable water outlet controls the cruise direction
by changing the direction of the sprayed water. The ballast tank
controls the diving of the eco submarine by charging or discharging
water.When the eco submarine works closing to the bottom of pool,
accessory filters are aviliable and help to get better performance.