AquaParts Aquaponics Bell Siphon with View Window and Media Guard A Bell Siphon is an elegant way to drain your grow bed in a flood and drain aquaponics system without using a timer to turn your pump on and off. Pumps that run continuously suffer less wear and tear. This may result in a longer pump life. Faster grow bed draining results in more aeration Features a view window so you can see the physics in action! Comes with complete installation tuning instructions!