How to reduce the use of spa chemicals

If you find you're using more sanitising chemicals to keep your water clean, here are a few tips to help








An important part of maintaining your spa water is using some type of sanitiser such as spa chlorine, or hydrogen peroxide. This is essential to kill bacteria and maintain your water quality.

Oils, grease, scum, and bacteria can build up in your water over time, making your water harder to sanitise, and potentially even unsafe for your health. In addition, they can cause foaming as you can see in the picture below!

Spa Safe Spa Bath Sanatiser


There are a few things you can do to help maintain your water quality so you can use less sanitiser. While they are essential, these chemicals add a cost to maintaining your spa and some of them can be harsh on skin, clothing, and hair.  


If you’re finding yourself using more and more sanitiser in your spa water, here are a few things you can do.

Please note the recommendations in this article are guidelines only. We recommend you always follow the directions for dosage on your sanitiser labels.


1. Use a Degreaser product to remove the build up of oils in your spa

There are several ways to reduce the use of sanitisers, and one of the most effective ways is to ensure that the inner surface and pipe-work of your spa bath or spa pool is clean and free from oil and fat build-up where bacteria and microorganisms can flourish.

We recommend ‘Spa Safe’ Spa Pipe Sanitiser.



Spa Safe is a commercial product used in spa baths that do not have filtration systems and often used in public settings like hotels and lodges. In commercial hospitality settings, it is required that pipe cleaner is applied between each guest to remove body fats, soaps and other deposits that block pipes and nozzles which can become a serious hygiene problem.


Circulating water only through the pipe-work does not clean the inner surfaces of the pipes

This requires a pipe degreaser and sanitiser. It stands to reason that using what the professionals use would be best. They use Spa Safe spa pipe sanitiser.

Spa Safe is ideal to use in spa baths and spa pools. It is easy to use, acts instantly and effortlessly and it has a very gentle aroma.


How to use Spa Safe Degreaser in a Spa Bath

  1. Fill the bath with cold water to above jet line (if using in a spa bath)
  2. Add 50mls of Spa Safe to the spa water then turn jets (pump) on
  3. Run jets for 30 minutes. Very dirty pipes will require a longer time
  4. Turn the jets off and drain the bath. Rinse the bath with cold water
  5. Using Spa Safe on a clean, damp cloth wipe bath surface and surrounding area
  6. Polish the bath with a clean, dry cloth for a sparkling shine


How to use Spa Safe Degreaser in a Spa Pool


(Originally published on our Online Knowledge base).


Pipe degreaser works best when water is still warm, as this helps to loosen substances inside your pipework.

  1. Remove your filters
  2. Follow the dosing instructions on your pipe degreaser and instructions on the label
  3. We recommend running your spa for 15-30 minutes, so the pipe degreaser has time to work through the pipe work
  4. You may also wish to change the direction of your jets so they are facing downwards and reduce any foam that could come from the pipe degreaser.


NOTE: If you have had experience with the spa foaming when using pipe degreaser, remove filters, soak in filter cartridge cleaner and hose down with water before reinstalling into the spa.


Spa Safe comes in two convenient sizes: 1 Litre, 5 Litre.

If you are not regularly using a pipe degreaser and sanitiser your spa is not as clean as it could be.

Read more about Spa Safe Sanitiser or buy now



2. Shower before you jump in the spa!

After a long day, it might be tempting to just hop straight in the spa when you get home for a relaxing soak. But if you don’t shower first, you could be creating more work in the long run and make it harder to keep your water clean.


Shower before you spa


Grime, natural body oils and residues from lotions, soaps, shampoos can build up on your skin and are washed into your spa water. Even if your personal hygiene is impeccable! 


As a result, you’ll find your filters are not working as efficiently and you’ll be using more sanitiser to keep your water clear.


So take the extra 2 minutes to have a quick rinse off before unwinding in your soothing spa water! You’ll thank yourself for it later when it comes time to clean your spa.


View our range of outdoor showers

Poolstar 35L Solar Shower With Foot Wash  Poolstar 40L Solar Shower With Foot Shower  Waikiki Stainless Steel Outdoor Shower


3. Use an absorbent disc to collect oils and lotions that can build up in your spa water

Even if you’re rinsing before you get in the spa, over time, your spa water can build up a residue of oils and greases.

The Scum Buddy disc can help reduce this build up in hot tub and spa water. It’s made from a specially formulated material that repels water and helps absorb the unwanted oils that can build up in your water. 

Blue Devil Scum Buddy - Absorbent disc


Reducing oils and grime in your water helps prevent the scum line that can form around the edges of your spa. As a result, your filters don’t have to work as hard to keep your water clean and clear.

It’s reusable too - wring out the oils, rinse with fresh water and carry on using it!

This affordable little device is well worth the investment. 

Read more or order your Scum Buddy Now.


4. Clean your filters regularly

We recommend cleaning your filters every week to help reduce the build up of oils and residue which makes them less efficient. Soaking your filters overnight in a filter cleaning solution then using a Filter Wand to rinse them out will get you the best results.


Zodiac Filter Cartridge Cleaner 1Kg   Spa Store 500ml Filter Cartridge Cleaner

Heavy Duty Filter Cleaning Wand



Read our detailed filter guide on keeping your filters clean.


5. Check your water balance

If your water pH is too low or too high, this can result in the need for more sanitising and other water treatments to keep your water balanced.

Your pH should be in the range between 7.2 and 7.8. If it is below 7.2 then it is too acidic and you'll need to add an alkalinity increaser to bring your water balance up to the correct range.

If your water pH is about 7.8, then it is too alkaline and you will need to use a pH decreaser.

Read more about testing and balancing your spa water



6. Treat your spa water for Algae

If your spa water has built up a high level of phosphates, then can be the perfect environment for Algae to grow. Phosphates are introduced into your spa water from household soaps and detergents which are carried into the water on our bodies as well as airborne from dust and leaves.


Using a algaecide every few months will help kill off Algae and help keep your spa water clean and clear.

Poppits® Pool Algicide Conditioner and Clarifier


Read our detailed article on how to treat for Algae


7. Change your spa water


We recommend that you change the water in your spa approximately every 3 months, depending how regularly it is used. When you’re changing your spa water, it’s a great opportunity to use a degreaser and flush through the old water before you drain the water out. This clear oils and greases out of the pipes - so your spa system will work much more efficiently with the fresh water!


How to use a spa pipe degreaser when changing your spa water.


Struggling with other issues in your spa water?

Check our blog for more helpful tips, use the live chat on the site (bottom right corner) or contact us directly and we’ll be happy to help.

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