Fish Aquarium, which can be magically drained of dirty water and filled with clean water This product is a useful fish bowl for people who feel it is troublesome to change the water It's a betta fish tank or aquarium When you pour clean water into the fish bowl, dirty water and debris can escape because of the capillary action This provides a crystal-clear, happy and healthy home all the time When you pour approximately two cups of clean water into the fish bowl, the fish tank uses capillary action to move dirty water, excrement and debris into the storage compartment on the back of the aquarium, which only needs to be emptied periodically This easy nano fish tank will make you happier and more comfortable every day This nano fish tank has a passageway to dirty water and debris that gets discharged from the bottom of the tank to the back compartment through the tunnel Dirty water runs out of the capillary system and escapes, along with the feces of such as betta fish or guppies As long as you throw the collected water on the back compartment regularly, you can keep the aquarium clean all the time That can be Used as a Betta Fish Tank with This Fish Bowl on a Table Item: Lazy fish tank Volume: 25L Colour:white Material:Acrylic Size:18 x 17 x 165CM package contents: 1 * Fish tank Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.