Understanding the Different Types of Pool Filters

Keeping a pool clean requires the correct pool filter. With so many options available, choosing the best filter for your needs might take time and effort. This detailed guide will teach you about the various types of pool filters, their benefits, and how to select the best one for your pool.

Introduction

Swimming pool filters for above ground and inground pools help to keep them clean by eliminating debris, dirt, and other impurities from the water. Regular maintenance and filtration are essential for keeping your pool safe and pleasant. Understanding the many types of pool filters, their functions, and their benefits will allow you to make an informed decision.

Types of Pool Filters

1. Sand Filters

Overview

Pool sand filters are among the most popular types of filters. They use sand as the filtration medium to remove particles from the water.

How They Work

Water passes through a bed of sand in the filter tank. The sand retains dirt and debris, allowing clean water to pass through and back into the pool. Over time, the sand gathers particles that require occasional backwashing.

Advantages

• Cost-Effective: Sand filters are typically less expensive than other varieties.
• Low Maintenance: They require less regular maintenance and backwashing than other filters. 
• Durable: Sand filters for inground and above ground pools are well-known for their durability and can last several years.

Disadvantages

• Less Efficient: Sand filters are less effective in catching fine particles than cartridge or diatomaceous earth (DE) filters.
• Backwashing Required: Regular backwashing is required to maintain efficiency, which wastes water.

2. Cartridge Filters

Overview

Pool cartridge filters use a pleated cloth or paper element to remove debris and impurities from pool water.

How They Work

Water flows through the cartridge element, catching dirt and particulates. The cleaned water is then returned to the pool. Pool filters cartridges are generally easier to remove and clean than sand or DE filters.

Advantages

• High Efficiency: Cartridge pool filters catch smaller particles than sand filters, producing clearer water. 
• Low Water Waste: The cartridge filters for swimming pools, unlike sand filters, do not require backwashing, which helps to save water waste. 
• Ease of Maintenance: Cartridges are simple to remove and clean, making pool care easy.

Disadvantages

• Higher Initial Cost: Cartridge pool filters for inground and above ground pools typically cost more than sand filters. 
• Regular Cleaning: While backwashing is not required, the cartridges must be cleaned or replaced regularly to ensure proper operation. 

3. Diatomaceous Earth (DE) Filters

Overview

DE filters use a fine powder of fossilized diatoms to filter pool water. They are famous for their excellent filtration efficiency.

How They Work

Water passes through a DE-coated filter grid located within the filter tank. The DE powder creates a coating that catches even the tiniest particles, improving water clarity. Periodic backwashing is essential to remove the DE powder and dirt.

Advantages

• Superior Filtration: DE filters provide the highest level of filtration, eliminating even the smallest particles from the water. 
• Cleaner Water: They offer remarkable water purity and quality. 
• Effective for Long Periods: DE filters can last long without being cleaned. 

Disadvantages

• Higher Maintenance: DE filters require constant backwashing and reapplication of DE powder, which can be effortful.
• Cost: They are often more expensive than sand and cartridge filters in terms of original investment and ongoing swimming pool maintenance. 

Choosing the Right Pool Filter

Various factors determine the ideal pool filter, including pool size, usage, budget, and personal preferences. Here are some considerations to help you make the proper decision:

Pool Size and Usage

• Small Pools: Cartridge filters, which are efficient and easy to maintain, may be sufficient for small pools or spas. 
• Large Pools: Sand or DE filters may help larger pools by providing higher flow rates and cleaning capacity. 

Budget

• Initial Cost: Sand filters are usually the most economical, followed by cartridge and DE filters. 
• Long-Term Costs: Consider the long-term maintenance expenditures, such as water usage and filter replacement. Cartridge filters typically have lower fixed costs than DE filters. 

Maintenance Preferences

• Low Maintenance: A sand filter may be the best choice if you desire low maintenance. It takes minimal cleaning and backwashing. 
• High Efficiency: A DE may be the best pool filters for above ground and inground pools if you value water purity and ready to invest time in maintenance. 

Water Quality

• Regular Use: For pools with frequent use and high debris levels, a DE filter provides improved filtration and can handle increased demand. 
• Occasional Use: A cartridge or sand filter may be sufficient for less frequently used pools. 

FAQs: Pool Filters

How long do pool filters last?

• Sand Filters: Typically lasts between 5 and 10 years. The sand inside may need to be refilled every 5–7 years. 
• Cartridge Filters: Usually lasts two to four years, depending on usage and care. 
• DE Filters: Although the filter grids or elements can last up to ten years, the DE powder must be renewed regularly. 

How often to clean pool filters?

• Sand Filters: Backwash the filter when the pressure gauge indicates 7 to 10 psi over the normal operating pressure. 
• Cartridge Filters: Clean the cartridge every 4 to 6 weeks or if the pressure gauge indicates a considerable increase in pressure. 
• DE Filters: Backwash the filter when the pressure gauge shows a 7 to 10 psi, then replace the DE powder as needed. 

What is DE in pool filters?

DE, or diatomaceous earth, is a natural, fine powder made from fossilized diatoms that coats the grids inside a DE filter. It provides superior filtration by trapping even the smallest particles. We can expertly maintain and replace DE filters for optimal pool cleanliness.

Can I install a salt water pool filter myself?

If you have the right equipment and knowledge, you can install a pool filter yourself. However, expert installation for salt water pool filters is recommended to ensure appropriate configuration and avoid potential problems. Anomaly Pool Services provides skilled installation to ensure peak performance and dependability. 

How do I know which filter is best for my pool?

Consider pool size, water usage, budget, and maintenance preferences. Consult with a pool professional, such as Anomaly Pool Services, to identify the appropriate type of swimming pool filters and pumps for your specific requirements.

What are the signs that my pool filter needs maintenance or replacement?

• Increased Pressure: A considerable increase in pressure on the gauge suggests that the filter is clogged or needs to be cleaned. 
• Poor Water Quality: If the water is cloudy or contains particles, it could indicate that the filter isn't working effectively. 
• Frequent Backwashing: If you have to backwash the filter more often than usual, it may be time for maintenance or replacement. 

How to run pool pump without it filtering?

If your system allows for it, you can set your pump to "recirculate" mode. This setting skips the filter, enabling water to circulate through the pump and return to the pool without passing through it. This is useful when you need to keep the water circulating without placing strain on the filter, such as during chemical treatments or when the filter is being serviced. If you're not sure how to manage this, check your pool's manual or contact a professional service like Anomaly Pool Services for help.

How often to change sand in pool filter?

Anomaly Pool Services recommend changing sand in sand filter every 3-5 years to ensure proper filtration and clean water.

How often to backwash sand filter?

It is recommended to backwash your sand filter every 1-2 weeks to ensure top performance or if the pressure gauge shows a 7-10 PSI increase from the clean baseline.

What type of sand is used for pool filters?

Anomaly use high-quality #20 silica sand, which is specifically intended for pool filters to deliver effective filtration.

Conclusion

Understanding the many types of pool filters and their functions is crucial for keeping a swimming pool clean and appealing. Whether you use a sand, cartridge, or DE filter, each has advantages and disadvantages. You can choose the ideal filter for your pool by evaluating its size, usage, budget, and maintenance preferences. 

Anomaly Pool Services specializes in maintaining and installing high-quality inground and above ground swimming pool pumps and filters to keep your pool clean and efficient all year.