The pool filter is a key component of any swimming pool’s circulation system, and its primary function is to remove dirt, debris, and other contaminants from the water. Without a properly functioning filter, pool water can become cloudy, dirty, and potentially harmful to swimmers. In addition to removing unwanted particles, the filter also helps to balance pH levels and maintain the overall chemical balance of the water. One crucial component of pool water quality maintenance is the pool filters.
There are several types of pool filters available, including sand filters, cartridge filters, and diatomaceous earth (DE) filters. Each type has its own unique set of benefits and drawbacks, and the best choice for a particular pool will depend on a variety of factors such as the size of the pool, the type of pool finish, and the local climate.
Sand Filters:
Sand filters are perhaps the most popular type of pool filters, and they are known for their durability and low maintenance requirements. These filters use a bed of sand to trap contaminants as water passes through them. The sand acts as a natural filter, trapping particles as small as 20-40 microns in size. As the filter becomes clogged with dirt and debris, the water flow decreases, and it is time to backwash the filter. This process involves reversing the flow of water through the filter to flush out the trapped contaminants and restore the filter’s effectiveness. Sand filters typically need to be backwashed every 1-2 weeks, depending on the amount of use the pool gets and the local climate conditions.
Cartridge Filters:
Cartridge filters are another popular choice for pool owners, and they work by trapping contaminants within a pleated paper or synthetic cartridge element. These filters are known for their high efficiency, as they can trap smaller particles than sand filters (down to 5 microns in size). Cartridge filters require less backwashing than sand filters, as the cartridge element can be removed and cleaned by hosing it off or soaking it in a cleaning solution. However, cartridge filters do have a shorter lifespan than sand filters and may need to be replaced every 1-2 years.
Diatomaceous Earth (DE) Filters:
DE filters are a more advanced type of pool filter that uses a fine powder made of fossilized diatoms to trap contaminants. These filters are known for their extremely high filtration efficiency, as they can trap particles as small as 1-3 microns in size. DE filters require a bit more maintenance than sand or cartridge filters, as the DE powder needs to be added and removed from the filter on a regular basis. However, DE filters are very effective at maintaining crystal clear pool water and are a popular choice for commercial and high-end residential pools.
