Should I use chlorine or bromine in my hot tub?

Chlorine acts more quickly, whereas bromine performs better at spa temperatures and over a broader pH range. Correctly dosed, either option is effective and safe.

What free chlorine level should a hot tub hold?

Maintain free chlorine between 3 to 5 ppm and combined chlorine under 1 ppm. For bromine, use 4 to 6 ppm.

Can I switch from chlorine to bromine?

Yes, following a complete fresh fill. Do not combine both systems within one fill because readings become unpredictable.

How long after dosing chlorine can I get in?

Bathing can resume below 5 ppm free chlorine. A minor top-up usually reaches this point after 20 to 30 minutes of pump circulation.

Why does my hot tub smell of chlorine?

Strong odour indicates elevated combined chlorine rather than excess free chlorine. Apply non-chlorine oxidiser as a shock treatment to break it down.

Deep Blue Spas Hot Tub Water Sanitisers

Routine hot tub treatment depends on maintaining sanitiser. For UK domestic spas and smaller commercial sites, Zagosa Industrial offers four Deep Blue Spas systems: stabilised chlorine, bromine, BCDMH and chlorine dioxide.

Products in this range

Deep Blue Spas Chlorine Mini Tablets
Deep Blue Spas Multifunctional Chlorine Tablets 20g
Deep Blue Spas Hot Tub Bromine Granules BDCMH
Deep Blue Spas Hot Tub Bromine Tablets 20g - Slow Dissolving
Deep Blue Spas Stabilised Chlorine Granules SDIC
Deep Blue Spas Pool Chlorine Tablets 200g - Slow Dissolving
Deep Blue Spas Sodium Hypochlorite 14/15% - Liquid Chlorine
Deep Blue Spas Multifunctional Chlorine Tablets 200g