What Chemicals Do You Need For a Hot Tub?

If you own a hot tub or spa, the reasons behind your purchase were probably to do with wanting a place where you can relax and unwind after a busy day. You’ll want to slip into the tub and feel the warm water remove the stresses and aches of the day.

So what you don’t want to find when you reach your hot tub is that the water isn’t clear or fresh – instead of having time to relax, you’ll just be faced with more work. This is why it is so important to ensure you are using the right hot tub chemicals.

Caring for Your Lay-Z-Spa: Guide to Hot Tub Chemicals

Hot Tub Chemicals

Chemicals keep your hot tub in great condition, and getting them right can save you a lot of time and energy in the future. We take a look at which chemicals you will need to use for your hot tub.


Sanitising your pool is an essential process that kills off bacteria and potential viruses within the hot tub. Therefore, you will need a chemical that can sanitise your tub effectively. You have two options:

  • Chlorine
  • Bromine

We recommended our AquaSparkle Bromine Pods that are simple, secure and a cost-effective way to sanitise your hot tub. Chlorine is typically used for swimming pools, whereas bromine can withstand higher temperatures. Additionally, bromine is a preferred option for those with sensitive skin.

However, if you do prefer using chlorine, we also stock Lay-Z-Spa chlorine tablets and other products that'll help keep your spa sanitised. 

Managing your pH Levels

It is essential to keep the pH level of your water right. If the pH doesn’t fall within the optimum range of 7.2 - 7.8, then it can cause skin irritation to those in the water and open the door to more problems, such as algae or mineral build-up.

Using hot tub test strips to check the pH level of the water, you can then adjust the levels accordingly using pH Plus or pH Minus chemicals to achieve the right level.

If the alkalinity of the pool is wrong, then you can adjust this by using a pH decreaser to lower alkalinity and TA Plus to raise the alkalinity.

Active Oxygen

Active Oxygen is another form of disinfectant for the water, using chlorine and active oxygen to purify the hot tub. It creates a more natural water quality and should be used once a week to ensure the pool is well maintained. Check out our active oxygen granules for a cost-effective purification.

Hot Tub Chemicals: Spa Time Active Oxygen

Non-Chlorine Shock

Shock is used to kill any algae that cannot be filtered out, helping to ensure the hot tub is clean and sanitised. It is advised that you shock your hot tub on a weekly basis or if the water goes cloudy. Our non-chlorine shock chemicals is an essential part of hot tub maintenance to ensure maximum sanitisation.

Hot Tub Chemicals: Non-Chlorine Shock Granules

Need chemicals for your hot tub or pool? Here at 1st Direct Pools, we have a huge range of chemicals for your hot tub, including chlorine and bromine, to help keep your pool clean and ready to use!

Each product provides clear guidance of how much and how often you should use them, based on the specific formulas of each product. However, if you need more advice on when and how much you should use for your hot tub, please feel free to contact our expert team.

Pool Shock Dosage Advice: How Much Chlorine Shock Should You Add?
How to Increase Alkalinity in Hot Tubs