Crashing the Bromine Level with Sodium Thiosulfate

[cognitios]

Hello,

I work at a CPO pool company and my coworker who is a CPO at a commercial property and looking for some advice on a certain problem. My pool somehow got bromine in it (17.7) with a chlorine level of 7.7, this is a 60,000 gallon pool and the kitty pool has the same value. I can't remember the rest of the values everything seemed to be ok. My question is moreso if I put sodium thiosulfate in (my math says 20 lbs) will it:

A. crash out the bromine, i don't really care if it crashes out the chlorine as if i crash both I'll just add chlorine tomorrow.
B. are there any side affects from adding too much thiosulfate, I'd rather add more than less as I want to wipe out all the Bromine.

Thank you

 

[mknauss]

Welcome to the forum! :handshake:

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To my knowledge it takes many months at best, sometimes years, for bromine to break down, so the only way to convert to chlorine is to do a total water replacement.

 

[JamesW]

Why do you think that you have bromine?

A regular test kit can't distinguish chlorine from bromine.

Unless you have added bromine tabs or sodium bromide, you shouldn't have any bromine in the pool.

Some test kits have a chlorine and bromine scale but that doesn't mean anything.

If you did have bromine or bromide in the water, neutralizing the levels wouldn't help. Any bromine would become bromide but it would be reactivated when you added chlorine again.