From Gunk to Glory: Discovering the Magic Behind Your Hot Tub's Filtration System

Keeping your hot tub clean is essential for an enjoyable and safe spa experience. But do you know how to keep your hot tub water sparkling? It all starts with the filtration system! Let’s take a look at the basics of hot tub filters, why they’re important, and what types are most common so that you can keep your hot tub water crystal clear.

What Do Hot Tub Filters Do?

Hot tubs are a great way to unwind, relax, and bask in the warm, soothing water. However, to keep the water crystal clear, it is essential to have a filtration system in place. Hot tub filters are vital in keeping the water clean by removing debris, hair, oils, and other impurities that can accumulate over time. They work tirelessly to ensure that the water is safe for people to use. Algae and bacteria can quickly grow without a reliable filtration system, making the water murky and uninviting.

Why Hot Tub Filtration Matters

When it comes to hot tubs, cleanliness is key, and this is where filtration becomes crucial. Proper hot tub filtration ensures the water is free of dirt, debris or other unwanted particles that might compromise the experience. Without adequate cleaning, hot tubs can become breeding grounds for bacteria, algae and other harmful microorganisms, putting you at risk of infections.

Hot tub filtration is important for maintaining water quality and helps the equipment run efficiently while extending its lifespan. Whether you are a first-time hot tub owner or a seasoned pro, investing in a reliable filtration system is essential to ensure your hot tub remains an enjoyable and safe place to relax.

Hot Tub Filter Types

Cartridge Filters

Cartridge filters use a cartridge made of polyester or similar material to strain out contaminants from the water. Unlike sand filters, cartridge filters do not require backwashing, which makes them more water-efficient. They are also easier to install and maintain, as they can be easily removed, cleaned, and replaced. Most high-quality hot tubs in the UK will come with cartridge filters built-in, and it’s important to replace them every 1-2 years, or even longer if they’re good quality.

Sand Filters

Sand filters are most commonly found in pools, but they are also occasionally used for hot tubs. They work by passing the water through a bed of sand that catches impurities and debris. Sand filters are economical and easy to maintain, but they require regular backwashing to clean the sand bed and ensure proper filtration. Sand filters are best suited for hot tubs that are used occasionally.

Ozonator Filters

Ozonator filters use ozone to disinfect the water in your hot tub. Ozone is a powerful oxidising agent that destroys bacteria, viruses, and other pathogens. Ozonators are eco-friendly and require minimal maintenance since they do not use a filter cartridge or require backwashing. However, ozonators do not filter out debris or other contaminants, so they need to be used alongside other types of filters. Most of our hot tubs come with an Ozonator.

Combination Filters

Combination filters combine two or more filtration technologies, such as sand and cartridge, to offer better filtration performance. Combination filters are versatile and can be customised to meet the specific needs of your hot tub. However, they may be more expensive upfront, and some require more maintenance than single-stage filters.

How Your Hot Tub's Water Gets Filtered

Your hot tub's filtration system works by drawing water from the spa through the filter cartridge or other type of filter, trapping dirt and debris. The clean water then gets circulated back into the hot tub via a pump. As the water is pumped back in, it passes through an Ozonator, which disinfects and purifies it before it reaches your spa.

Your hot tub's filter plays a vital role in keeping the water clean and safe to use. It’s important to make sure you choose a reliable filtration system that is easy to maintain and replace when necessary. At Celtic Spas, we stock a wide range of filters and filtration systems designed to keep your hot tub clean and running smoothly for years to come.

Maintaining Your Hot Tub Filter

Know your filter type

For cartridge filters, this means checking to see if the filter material is clogged with dirt or debris that could reduce water flow. You should also keep an eye on your hot tub's pump strainer basket, which collects any large particles that may have been missed by your filter. Clean or replace your filter as necessary.

For sand filters, backwashing is required to clean the filter bed and maintain proper filtration performance. You will need to backwash the filter at least once a month, depending on how often you use your hot tub.

For Ozonators, you should check the ultraviolet bulb regularly for any signs of damage or wear and tear. If the bulb needs to be replaced, you should do so as soon as possible to ensure optimal performance.

Regular cleaning

No matter the type of filter, regular cleaning is essential for optimal performance. Make sure you check your filter at least once a week, and clean as necessary to remove any built-up dirt or debris. This will help keep the water in your hot tub healthy, clear, and safe to use.

Deep cleaning

In addition to regular cleaning, it's a good idea to perform a deep clean of your filter every three to four months. This involves soaking your filter in a chemical solution (or a natural alternative like white vinegar) to dissolve built-up debris and contaminants. Follow the instructions on the solution carefully, and rinse your filter to avoid any chemical residue.

Check your water chemistry

Proper water chemistry is crucial for maintaining a healthy hot tub filter. Test your water once a week and adjust accordingly to keep your pH, alkalinity, and sanitiser levels in check. High levels of pH or alkalinity can cause calcium deposits to build up on your filter, leading to clogging and reduced efficiency. Low sanitiser levels can cause bacteria to thrive, leading to algae growth and other water quality issues.

Replace worn or damaged parts

Even with proper maintenance, parts of your hot tub filter may become worn or damaged over time. Regularly inspect your filter for any signs of damage, such as cracks, tears, or worn-out gaskets. Replace any damaged parts as soon as possible to avoid further damage to your filter or hot tub system.

When to Replace Your Hot Tub Filter

Hot tubs are a great way to unwind after a long day, but to keep your tub functioning properly, it's important to know when to replace the filter. A dirty or clogged filter can hinder performance and even lead to health concerns. If you notice cloudy or murky water, strange odours, or foaming, it's time to look closer at your filter.

Experts recommend replacing your hot tub filter every 12-18 months, depending on usage. However, if your hot tub gets heavy use or many people use it, you may need to replace the filter more frequently. By monitoring your filter and knowing when to replace it, you can ensure that your hot tub remains a relaxing and healthy escape.

Conclusion

Taking care of your hot tub filtration system is a vital part of regular maintenance. It can be easy to forget that these systems are quietly working hard—but if they fail to function properly, they require urgent attention. After all, dirty water isn't just a visual turnoff; bacteria and algae can run rampant, leading to illnesses when present in the water we enter or drink. Being mindful of your filter's upkeep need not be a full-time job, but regular checkups are necessary to prevent gunk from taking over.

Celtic Spas is a leading UK supplier of high-quality hot tubs and spas to homes nationwide. Enjoy unrivalled comfort at home and reap the numerous benefits of hot tubs every single day. Shop for your dream hot tub and enjoy 0% finance plans with most of our models.