The SkimDoctor creates a vortex in your skimmer and increases surface water velocity.
Here’s The Nerdy Stuff:
First of all, check out the slots. The slots in the inner tube of SkimDoctor 2.0 are partially responsible for speeding up the flow of water, (more precisely, the flow of surface water,) in your pool skimmer. By forcing water to flow through SkimDoctor’s narrow slot, SkimDoctor increases the top surface speed.
In more technical terms, when water moves from a wider channel to a narrow channel, the volume of the water that moves a given distance in a given time period does not change, however, the speed of the water increases. This phenomenon is called the Bernoulli principle – and it explains why water flows quickly in white water rapids, where rocks narrow the width of the water channel. In addition, the SkimDoctor 2.0 tube itself forces water to flow around the tube in two directions, thereby narrowing the water channel, and creating a three-fold Bernoulli effect.
Most all pool debris enters through the top surface of the water. Because SkimDoctor increases surface water speed, debris is drawn more quickly into your pool skimmer basket, which may allow you to run your pump less. It’s important to remember that water velocity and energy savings are only some of the benefits of SkimDoctor… SkimDoctor also prevents you from having to put your hand through all the gunk to remove the skimmer basket! Not only that, SkimDoctor increases the storage capacity of your pool skimmer basket.
(It is still a good idea to empty your pool basket frequently).