Your fibreglass pool needs the right filter to stay clean, safe, and sparkling all year round. With so many options available, it can be tricky to know which system will work best for your backyard. Each filter type has its own strengths and drawbacks, and choosing the right one depends on your pool size, how often you swim, and how much time you want to spend on maintenance. Here are five of the most effective pool filter options explained in detail, so you can make the best choice for your lifestyle.
Choosing The Right Filter For Your Fibreglass Pool
Every pool is different, and so are the needs of pool owners. The right filter doesn’t just keep your water looking clear — it helps keep your swimming environment healthy and reduces the amount of chemicals you need to add. Some systems are low maintenance and cost-effective, while others provide exceptional clarity but require more frequent attention. By understanding the differences, you can match a filter to your habits, budget, and long-term expectations. Making the right choice now will save you hours of frustration and give you more time to enjoy your pool.
Cartridge Pool Filters
Cartridge filters are a popular choice because they’re simple, effective, and relatively affordable. Instead of sand or media, they use a pleated cartridge element to trap dirt, oils, and debris as water passes through.
One of the biggest advantages is that cartridge filters don’t require backwashing. That means you’ll save water and reduce waste compared to some other systems. Cleaning usually involves removing the cartridge, rinsing it with a hose, and reinstalling it — a process that only takes a few minutes once you get the hang of it. Cartridges will need replacing eventually, but how often depends on how much you use your pool and how well you maintain it.
If you want a filter that delivers excellent water clarity with straightforward upkeep, a cartridge filter is a reliable choice. It’s also a great option if your backyard doesn’t have a lot of space, as these filters are compact and easy to fit alongside your pool equipment.
Sand Pool Filters
Sand filters have been used for decades, and they’re still one of the most trusted systems around. They work by pushing water through a bed of specially graded sand. The sand traps dirt and debris, while clean water is sent back into the pool.
Sand filters are tough and long-lasting, often running for many years with minimal issues. They don’t require much day-to-day attention — when the pressure gauge rises, you simply backwash the filter to clean it. This process involves flushing water backwards through the system, washing out trapped particles.
The main drawback is that sand filters may not catch the finest particles, so the water may not look quite as crystal-clear as it would with other systems. Still, they’re an excellent option if you want a dependable, low-effort filter that works well for medium to large pools. Many pool owners choose sand filters because of their durability and ease of use, especially if sparkling water clarity isn’t their absolute top priority.
Glass Media Pool Filters
Glass media filters are a modern upgrade to traditional sand filters. Instead of sand, they use crushed recycled glass as the filtration medium. This material has a smoother surface, which reduces clumping and improves the way particles are trapped.
One of the biggest benefits is efficiency. Glass filters can trap smaller particles than sand, giving you noticeably clearer water. They also resist bacterial growth better, which means fewer unpleasant odours or slimy build-up inside the filter. Because they don’t need to be backwashed as often, they use less water and save you time on maintenance.
While glass media filters cost more to set up, the savings add up over time because the glass lasts longer than sand. If you’re looking for a balance between strong performance, eco-friendly operation, and less ongoing work, a glass filter is an excellent investment. Many pool owners choose this option when upgrading from a sand filter to improve both water quality and ease of care.
Diatomaceous Earth (DE) Pool Filters
If you want the clearest water possible, DE filters are hard to beat. They use a fine powder made from fossilised algae to coat internal grids, creating a porous surface that traps even the tiniest particles. The result is water that looks sparkling and feels silky smooth.
DE filters are especially good if you’re sensitive to water quality or you simply prefer the highest level of clarity. However, they do require more hands-on maintenance. After each backwash, you need to add fresh DE powder to keep the filter working properly. The powder must also be handled carefully, as it’s a fine substance best managed with protective equipment.
Despite the extra steps, many pool owners feel the results are worth it. If you value pristine water and don’t mind a bit of extra effort, a DE filter might be the perfect fit for your fibreglass pool.
Combination Pool Filters
Some systems combine different types of filtration to deliver the best results. For example, a cartridge filter may be paired with a media filter to capture both large debris and microscopic particles. These hybrid systems are designed to minimise maintenance while maximising water clarity.
Combination filters can cost more upfront, but the payoff comes in convenience and long-term water quality. You’ll often find yourself spending less time cleaning and balancing chemicals because the filter system is doing a thorough job on its own. For busy families who want consistently sparkling water without the hassle, a combination filter can be a smart investment.
They’re particularly useful for pools that see heavy use, such as those used by kids every day in summer or households that frequently entertain guests. The added efficiency helps the system keep up with high demand, leaving you free to enjoy the water rather than worry about its condition.
So What Filter Should You Use?
The right filter is the key to keeping your fibreglass pool looking beautiful and feeling safe. Cartridge, sand, glass, DE, and combination filters all offer different benefits, and the best choice depends on how you use your pool and how much maintenance you’re willing to do.
At The Fibreglass Pool Company, we’ve been helping Australians enjoy clean, sparkling pools for over 30 years. Our team can explain each option in detail and guide you towards the filter that suits your lifestyle best. Don’t let poor filtration spoil your pool experience — contact us today and take action to keep your pool crystal clear. The sooner you choose the right filter, the sooner you’ll enjoy water that’s healthy, inviting, and ready for every swim.
