How to use your Chlorine/ Bromide tablets in a hot tub.

August 9, 2021

Chlorine/ Bromine tablets is one of the most popular ways to sanitise your hot tub and keep it clear of bacteria. Here are some useful tips on how to apply your tablets.

Where do I put the Chlorine Tablets in the Hot tub?

 

Our Chlorine tablets are slow in dissolving so ideally using our Floating Dispenser is one of the best ways to ensure that you have good flow that allows the tablets to dissolve and also makes sure that the tablets are not in direct contact with the hot tub surface or with you family members or friends.

 

These smaller chlorine tablets are designed for use with chlorine feeders or with floating dispensers. They will slowly erode over a period of 3-5 days depending on the water flowing over them.

 

As they release chlorine relatively slowly it may be necessary to shock dose or oxidise prior to their use to first establish some chlorine more rapidly. Ideal Chlorine/ Bromine levels are between pools 1-3 mg/1 (ppm) spas 3-5 mg/1 (ppm) as tested by a test kit or strips.

 

 

How do I use the Chlorine Granules in my hot tub?

 

These rapidly dissolving chlorine granules are an ideal way to daily dose your hot tub and with minimal impact on the PH level of your tub, albeit it may be easier to have the floating dispenser and let it work for you, check regularly to see if its keeping up with your usage, in practice we found the granules a great way of giving your hot tub a boost if the levels have dropped due to the increased use.

 

In Summary

 

The flexibility of having the Tablets with the dispenser along with the odd boost, using the Chlorine granules is the ideal way of hitting the 3-5 ppm for Chlorine and Bromine in domestic hot tubs.

Infographic on hot tub running costs with spa photo and icons for electricity, insulation, water temp, use, chemicals, maintenance
By Luso Spas Team • October 12, 2026
Are hot tubs expensive to run? Learn real UK hot tub and swim spa running costs, what drives them and how to cut your bills with Luso Spas.
Close-up of a black and gray hot tub control panel with buttons and a small blue display outdoors.
By Luso Spas Team • October 12, 2026
Learn how to keep hot tub water crystal clear. Luso Spas explains testing, balancing, filtration and how to fix cloudy water step by step.
Air source heat pump beside a pool with “For Hot Tubs, Pools & Homes” text
By Jay Bowers • September 16, 2026
Heat hot tubs, pools and homes more efficiently with air source heat pumps from Luso Spas. Explore lower-carbon heating solutions and expert UK support.
By Luso Spas Team • September 16, 2026
Keep a cold plunge clean and safe: sanitizing, water testing, filtration tips, and a full weekly-to-annual maintenance schedule cold plunge experts at Luso Spas.
cooling down in a Luso Spas ice tub outdoor cold plunge pool in a sunny UK garden.
By Jay Bowers • August 10, 2026
Beat scorching summer heat with a ice bath Tub from Luso Spas. Explore top cold plunge models, transparent UK pricing, and local installation options.
Hot Tub Servicing & Maintenance
By Jay Bowers • August 10, 2026
Prepare your hot tub for autumn with expert servicing from Luso Spas. Lower energy bills, prevent breakdowns, and keep your water crystal clear. Book today!
Child in a swimming pool, smiling and giving two thumbs up above the water
By Jay Bowers • July 13, 2026
Discover how lowering the temperature can turn your spa into the perfect summer retreat, helping you relax & cool down.
Hot tub selection
By Jay Bowers • April 29, 2026
Get expert tips on choosing the right hot tub. Explore sizes, features, & budget options for your garden. Contact us for support!
Fire Pits For Sales
February 5, 2026
Enhance your outdoor space with fire pits, furniture & pergolas for year-round comfort. Contact us for expert hot tub maintenance!
Sauna Accessories
February 5, 2026
Explore premium sauna heaters & accessories for an enhanced experience. Contact us for expert advice on your sauna needs!