Skimmer pools are considered to be traditional. The water in such pools is filtered through a skimmer. The basket inside the skimmer helps collect most of the dirt which can be easily cleaned out.
The walls of skimmer pools are raised therefore the water level in the pool is 10 to 15 cm lower than the side of the pool.
Skimmer pools are easier to install than pools with an overflow system. They are cheaper.