I have been using Spa Marvel for years instead of bromine. Works as advertised.
Eric
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Easy and safe!
(2/22/2019)
Wow this is working. I was suprise when it came because I didn'T realise it was a one time use and good for 6 month kinda thing but it is... I love it.
Tristan
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Easy and safe!
(5/15/2019)
We only use this for our hot tub, and will never do without it again.
Eric -