Hot Tub Filters: How to Clean, Replace, and Choose the Best

If you’re dealing with cloudy water, strange odors, or even higher energy bills because of your hot tub, you’re not alone. Many hot tub owners face similar problems, and they often point to one culprit: the hot tub filter.

Whether you’re trying to figure out why your filter isn’t doing its job, wondering when to replace it, or just looking for a more efficient option, you’re in the right place.

It’s frustrating when you’re trying to enjoy a relaxing soak, only to be met with murky water or a noisy, overworked filter. These issues can be a real hassle, especially if you’re not sure how to fix them. But don’t worry—we’re here to help.

In this guide, I’ll explain what might be wrong with your filter and share some straightforward tips to get things back on track. Whether you need advice on cleaning, replacing, or choosing the right filter, you’ll find the answers here. I will share my experience with you to make your hot tub experience as smooth as possible.

Understanding Hot Tub Filters

By understanding the types of filters available and how your filter system works, you can ensure your hot tub remains a place of relaxation, not frustration.

Types:

Three types of filters, each with its own strengths and maintenance needs:

1. Cartridge Filters
   • Effectiveness: These are the most common and easiest to maintain. They capture dirt, oils, and small particles in a pleated fabric.
   • Maintenance: Cartridge filters require regular rinsing and occasional deep cleaning. They’re simple to replace when worn out.
2. Sand Filters
   • Effectiveness: Sand filters use a bed of sand to trap debris. They’re effective for larger particles but may not catch finer contaminants as well as cartridge filters.
   • Maintenance: These filters need to be backwashed regularly to clear out the trapped particles. The sand also needs to be replaced every few years.
3. Diatomaceous Earth (DE) Filters
   • Effectiveness: DE filters are the most thorough, capturing the smallest particles for crystal-clear water. They use a powder made from fossilized remains of tiny aquatic organisms.
   • Maintenance: These filters require more effort to maintain. The DE powder needs to be replenished after each backwash, and the filter grids should be cleaned regularly.

Other Different Types

They also commonly used hot tub filters:

1. UV Filters: Some hot tubs feature UV filters that utilize ultraviolet light to kill bacteria and viruses. UV filters are often used in conjunction with other filter types and are relatively easy to clean or replace.
2. Reverse Osmosis (RO) Filters: If you have a saltwater hot tub, an RO filter is necessary. It removes salt and other impurities, enabling water recycling back into the hot tub.

Filter Maintenance

Regular maintenance is key to keeping in top shape, ensuring clean water and a relaxing soak every time.

How to Clean:

1. Using Vinegar:
   • Step-by-Step Guide:
     1. Remove the filter from the hot tub.
     2. Rinse the filter with a hose to remove loose debris.
     3. Prepare a cleaning solution by mixing one part white vinegar with one part water.
     4. Submerge the filter in the vinegar solution and let it soak for 3-4 hours.
     5. Rinse the filter thoroughly with water to remove any remaining vinegar.
     6. Allow the filter to dry completely before reinstalling it.
   • Benefits:
     Vinegar is a natural and cost-effective cleaner that can dissolve calcium buildup and grime, making it a great option for routine maintenance.
2. Hot Tub Filter Cleaner Soak:
   • Benefits:
     Using a dedicated filter cleaner soak is more powerful than vinegar alone. These cleaners are specifically designed to break down oils, lotions, and other stubborn contaminants that can clog the filter. They often work faster and more thoroughly, making them ideal for deep cleaning.
3. Best Cleaner Products:
   • Recommendations:
     • SpaGuard Filter Cleaner: Effective for removing tough oils and scale.
     • Leisure Time Filter Clean: A popular choice for routine cleaning that’s gentle on filters.
     • AquaFinesse Filter Cleaner Tablets: Convenient and easy to use, these tablets are great for a quick soak.

Jet Stream Filter Cartridge Cleaner System

Try Jet Stream Filter Cartridge Cleaner System is a powerful tool designed to thoroughly clean and maintain your hot tub or pool filter. This tool is a must-have for keeping your filter in top condition and your water crystal clear.

Key Features:

• Pleat-separating Fan Jet: Separates and cleans outer pleats for a deep, effective wash.
• 360° Core Cleaning Wand: Reaches deep into the filter core, ensuring all dirt and grime is removed.
• Adjustable Pressure Handle: Control the water pressure to suit different cleaning needs.

Usage Notes:

• Easily attaches to your garden hose and works well with filter sprays or soaking cleaners.
• Offers excellent value, providing comprehensive cleaning that extends filter life.

How Often to Clean Hot Tub Filters

• Cleaning Frequency:
  • Regular Use: Clean every 2-4 weeks if you use the hot tub regularly. This keeps the filter working efficiently and extends its lifespan.
  • Heavy Use: If the hot tub is used frequently or by many people, cleaning every 1-2 weeks is recommended.
• Signs a Filter Needs Cleaning Sooner:
  • Cloudy Water: If the water starts to look cloudy, it’s a sign that the filter isn’t catching all the particles, and cleaning is overdue.
  • Reduced Water Flow: If you notice weaker jets or slower water circulation, the filter may be clogged and in need of cleaning.
  • Unpleasant Odors: A musty or chemical smell can indicate that the filter isn’t effectively removing contaminants.

Hot Tub Filter Replacement

Replacing it regularly is essential for maintaining water quality and extending the life of your hot tub. With these simple steps, you can ensure your filter is always up to the task.

When to Replace:

• Lifespan:
  Filters typically last between 12 to 24 months, depending on usage and maintenance. Factors like water quality, frequency of use, and regular cleaning habits can either extend or shorten this lifespan. Filters in frequently used hot tubs or those in areas with hard water may need replacing sooner.
• How Often to Replace a Filter:
  To keep your hot tub running smoothly, it’s recommended to replace the filter every 12-18 months. If you notice persistent issues like cloudy water, reduced flow, or frequent need for deep cleaning, it might be time to replace the filter even sooner.

How to Replace:

1. Step-by-Step Guide:
   1. Turn Off the Power: Ensure the hot tub is turned off at the breaker to avoid any electrical issues during the replacement.
   2. Remove the Filter Cover: Open the hot tub filter compartment by removing the cover or door.
   3. Remove the Old Filter: Twist or pull the old filter out, depending on your hot tub model. Some filters are held in place with clips or screws.
   4. Inspect the Filter Housing: Check the housing for any debris or damage. Clean out any dirt or buildup before installing the new filter.
   5. Install the New Filter: Insert the new filter into the housing, ensuring it’s securely in place. Follow the specific instructions for your filter type.
   6. Replace the Filter Cover: Once the new filter is installed, replace the cover or door.
   7. Turn the Power Back On: Restore power to the hot tub and run the system to ensure the filter is working correctly.
2. How to Remove Hot Tub Filter Housing:
   • Safety Tips:
     If the filter housing needs to be replaced or cleaned, follow these steps:
     1. Power Down: Always start by turning off the power to the hot tub.
     2. Drain the Tub (If Needed): Depending on the design, you may need to drain the hot tub to access the filter housing fully.
     3. Detach the Housing: Unscrew or unclip the filter housing from the tub. Be careful not to damage any connections or seals.
     4. Inspect and Clean: Before installing a new housing, check for any wear or damage. Clean the area to ensure a proper seal when reinstalled.
     5. Install the New Housing: Place the new housing in position, secure it with screws or clips, and ensure all connections are tight.

Hot Tub Filter Housing and Covers

Regularly inspecting and replacing the filter housing and cover when needed is essential for protecting your hot tub’s filtration system and maintaining top-notch water quality.

Housing Replacement

• When and Why You Might Need to Replace the Filter Housing:
  • Damage or Cracks: Over time, the filter housing can develop cracks or leaks due to wear and tear, harsh weather conditions, or chemical exposure. If you notice water leaking around the filter area or if the housing is visibly damaged, it’s time to replace it.
  • Poor Fit or Seals: If the housing no longer fits properly or the seals are worn out, it can lead to inefficient filtration and potential damage to the filter system.
  • Upgrading the System: You might also choose to replace the housing if you’re upgrading your hot tub’s filtration system to a more advanced or compatible model.
• Guide to Removing and Installing New Housing:
  1. Turn Off Power: Always ensure the hot tub is powered down to avoid any accidents.
  2. Drain the Hot Tub (if needed): Depending on the design, you may need to drain some or all of the water to access the housing.
  3. Remove the Old Housing:
     • Unscrew or unclamp the housing from its position. Be careful with the connections to avoid breaking or damaging any parts.
     • Inspect the area for any debris or buildup and clean it thoroughly.
  4. Install the New Housing:
     • Position the new housing correctly and secure it with screws or clamps.
     • Ensure all seals are intact and that the housing is firmly in place to prevent leaks.
  5. Refill and Power On: If you drained the tub, refill it, then turn the power back on. Check the new housing for any leaks or issues.

Filter Cover and Replacement:

• Role of the Filter Cover in Protecting the Filter and Maintaining Water Quality:
  • Protection: The filter cover acts as a shield, keeping debris, leaves, and other large particles from clogging the filter directly. It also protects the filter from direct exposure to harsh weather and UV rays, which can degrade the filter material over time.
  • Water Quality: By keeping large debris out, the filter cover helps maintain the efficiency of the filter, ensuring clean and clear water.
• Instructions on Replacing a Damaged or Worn-Out Filter Cover:
  1. Remove the Old Cover:
     • Open the filter compartment and carefully remove the old cover. Depending on the design, it might slide off, pop off, or require unscrewing.
  2. Inspect the Filter and Housing:
     • While the cover is off, take the opportunity to inspect the filter and housing for any signs of wear or damage.
  3. Install the New Cover:
     • Place the new cover over the filter, ensuring it fits snugly and securely. If there are screws or clips, tighten them to secure the cover in place.
  4. Test the Fit:
     • Once the cover is installed, run the hot tub to make sure everything is working properly and that the cover is staying in place without any issues.

Enhancing Filter Performance

Upgrading your hot tub’s filter system or adding a hose filter can make a significant difference in water quality and maintenance ease. These enhancements can help your hot tub run more efficiently, prolong the life of your equipment, and keep your water cleaner and safer for longer periods.

Hot Tub Hose Filter

• Benefits of Using a Hose Filter When Filling the Hot Tub:
  • Reducing Impurities: A hose filter is a simple yet effective tool for improving water quality right from the start. It attaches to your garden hose and filters out impurities like sediments, heavy metals, chlorine, and other contaminants that are commonly found in tap water. By reducing these impurities before they even enter your hot tub, you’re giving your main filter less work to do, which can extend its lifespan and improve the overall water quality.
  • Preventing Scale Buildup: In areas with hard water, a hose filter can also help minimize scale buildup, which can clog your hot tub’s plumbing and filter system over time.
• Choosing the Right Hose Filter for Your Hot Tub:
  • Compatibility: Ensure the hose filter you choose is compatible with your garden hose and easy to attach.
  • Filtration Capability: Look for a filter that specifically mentions its ability to remove the types of impurities you’re most concerned about, such as chlorine, heavy metals, or sediment.
  • Longevity: Consider how many gallons a hose filter can treat before it needs to be replaced. Some filters can handle multiple fills, while others are designed for single use.
  • Flow Rate: Make sure the filter allows for a reasonable flow rate so that filling your hot tub doesn’t take too long. Check out how to choose the right filter.

Upgrading Filtration System

• Options for Upgrading the Filter Pump or System:
  • Higher Capacity Pump: Upgrading to a higher capacity or more efficient pump can improve water circulation, ensuring that more water passes through the filter more quickly. This can lead to cleaner water and reduce the strain on your existing filter.
  • Advanced Filtration Systems: Consider upgrading to a multi-stage filtration system that includes additional layers of filtration, such as UV light or ozone systems, which can kill bacteria and reduce the need for chemical sanitizers.
  • Dual Filter Systems: Some hot tubs allow for the installation of a dual filter system, which increases filtration capacity and efficiency, making the water cleaner with less effort.
• Recommended Compatible Products or Upgrades:
  • Pump Upgrades: Look for pumps like the Waterway Executive 56 Frame pump, which offers higher horsepower and better energy efficiency. Check our Pump and Heater Replacement.
  • Advanced Filters: Consider the Pleatco Advanced Spa Filter Cartridges, which use a more durable fabric that filters finer particles and lasts longer than standard filters.
  • Multi-Stage Systems: An AquaFinesse Spa Clean system can be added to your existing setup, providing an additional layer of water treatment that works in conjunction with your main filter.

Troubleshooting Common Problems

Keeping an eye on filter and addressing minor issues promptly can save you time, money, and frustration. But when problems persist or seem beyond a simple fix, it’s wise to call in a professional to ensure your hot tub remains in top shape.

Signs Your Filter Needs Attention

• How to Tell if a Hot Tub Filter is Working or Needs Maintenance:
  • Water Clarity: If the water in your hot tub is consistently clear, your filter is likely working well. However, if it starts to become cloudy or murky, it’s a sign that the filter may not be functioning properly.
  • Water Flow: A strong, steady flow from the jets indicates that the filter is clean and unobstructed. If you notice a decrease in water flow, it could mean that the filter is clogged or nearing the end of its lifespan.
  • Noise Levels: Your hot tub pump should operate quietly when the filter is in good condition. If the pump is making unusual noises or seems to be straining, the filter might be clogged or damaged.
• Common Symptoms of Filter Problems:
  • Reduced Water Flow: If the water flow from the jets is weaker than usual, it’s often due to a clogged or dirty filter that needs cleaning or replacement.
  • Unusual Noises: A loud or struggling pump can indicate that the filter is clogged, making the pump work harder than it should.
  • Persistent Water Issues: If you’re frequently dealing with cloudy water, foul odors, or difficulty maintaining water balance, it’s a sign that your filter isn’t effectively removing contaminants.

DIY Fixes and When to Call a Professional

• Simple Solutions for Minor Issues:
  • Rinse the Filter: If you notice reduced water flow or cloudy water, the first step is to remove the filter and give it a thorough rinse with a garden hose. This can remove surface debris and improve performance.
  • Deep Clean the Filter: For more stubborn issues, soak the filter in a hot tub filter cleaner solution to break down oils, minerals, and other contaminants that a simple rinse can’t remove.
  • Check for Obstructions: Ensure there’s no debris or blockages in the filter housing or around the pump that could be causing issues.
• When to Call a Professional:
  • Persistent Problems: If cleaning the filter doesn’t resolve the issue or if the filter becomes clogged again quickly, it might be time to replace it or have a professional inspect the system.
  • Leaks or Damage: If you notice any leaks around the filter housing or damage to the filter itself, it’s best to consult a professional. Attempting to fix these issues yourself could lead to more significant problems.
  • Pump Issues: If the pump is making unusual noises or if there’s a significant drop in performance even after addressing the filter, it’s time to have a professional check the entire system. Check out Troubleshooting & Maintenance Guide

How to Measure Filter

To properly measure, you need to focus on two key dimensions: the diameter and the length. The diameter, which can be found by measuring across the outside of the filter, gives you the width. The length, measured from one end of the filter to the other, provides the necessary second dimension.

Armed with these two measurements, you can determine the correct filter size for your hot tub. To do this, simply measure the length and width of your hot tub. Multiply these dimensions together to calculate the square footage, ensuring you select the right filter size for optimal performance.

Remember, a well-maintained filter not only extends the life of your hot tub but also ensures that every soak is a relaxing and enjoyable experience.

For more detailed information and expert advice, be sure to visit Hot Tub Patio. Following the steps outlined here will help you enjoy a hassle-free hot tub experience for years to come.