Aquascape pond surface skimmers do the work for you.  They remove the unwanted debris, including protein film, from the top of the water before it has time to sink - making one less job for you.

 

These skimmers have large removable debris nets that are easy to maintain.

The PondSweep SK700pro has a maximum flow rate of 3,000 gph.  This works for a pond up to about 3000 gallons.
The PondSweep SK900pro has a maximum flow rate of 7,000 gph.  This works for a pond up to about 7000 gallons.
PondSweep's have a patented skimmer bellow that makes suction on the top of the water keeping the pond surface clear from debris.  Most of the dirt and debris that fouls your pond blows in and initially floats on the surface.  The patented bellows weir pulls more dirt and debris into the skimmer that any other skimmer.  The bellows door seals shut so that the mat and net are easy to remove and clean.   Recommended Flow: