On 10/12/2019 6:14 PM, Older woman wrote:
replying to Frank, Older womanÂ*Â* wrote:
Advice from a chemist is much appreciated! Im retired (72) & primarily use
a very small guest bathroom with a quickly nasty looking toilet bowl. I
recently used spa brominating tables instead of chlorine tablets (in a
Kaboom
system that bypasses the tank) for fear of inhaling chlorine gas. The
bromine
tablet worked great but also has a strong odor. Is the off gassing from
bromine or chlorine tablets toxic? Many Thanks.

Bromine is probably a little less toxic than chlorine. Both could
attack rubber seals and degrade other organic materials. I do not like
to use bowl cleaners that sit in the toilet tank at length. Small
quantities are safe in the septic as they get highly diluted and degraded.