brominated disinfection by-products

amin36

In The Industry
Nov 24, 2017
71
shahsavar
Guys
I would like to tell my clients to use bromine for their spas but i have heard that brominated disinfection by-products are far more dangerous than chlorinated disinfection by-products.i mean chlorine seems to be a safer option.

Any opinion?
 

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
16,249
Tucson, AZ
Guys
I would like to tell my clients to use bromine for their spas but i have heard that brominated disinfection by-products are far more dangerous than chlorinated disinfection by-products.i mean chlorine seems to be a safer option.

Any opinion?
Any halogenated disinfection by-products are bad for you. Bromine and chlorine tend to form different ones but there isn’t much difference in their impact on health. Iodine THM’s a d DBP’s are particularly nasty.

The trick is, you drain and refill the spa before it ever becomes an issue. Bromine is absolutely safe to use in a spa ... when it is used as-directed. You should always be exchanging the water in the spa several times per year. If the spa is heavily used with lots of different bathers, then water exchanges are probably better done on a monthly basis.

Using chlorine, you can differentiate between free and combined chlorine if you have the proper test kit. If you use bromine, then you can only really determine total bromine levels. So chlorine has a slight advantage if you want to use the CC level as a guide for water changes.
 

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
16,249
Tucson, AZ
In the US, the EPA has approved the use of chlorine, bromine, or biguanide as a spa sanitizer. One can also use potassium monopersulfate (MPS) and silver ions but only if the water temperature is consistently maintained above 98F otherwise the bacterial kill rate falls too low. MPS/silver sanitized hot tubs tend to get cloudy more quickly and need more frequent water changes.