What's the Best Hot Tub

Author Topic: HTH Super chlorine granules-Shock  (Read 2205 times)

Jim Perry

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HTH Super chlorine granules-Shock
« on: January 02, 2016, 11:18:47 pm »
Previous owner left us a 2 lb. bottle of hth super chlorinating granules. These are 54% chlorine. Just filled the tub for the first time. Need to shock the 200 gallon hot tub. What quantity is needed, and how does one measure that quantity, please?

Hot Tub Forum

HTH Super chlorine granules-Shock
« on: January 02, 2016, 11:18:47 pm »

chem geek

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Re: HTH Super chlorine granules-Shock
« Reply #1 on: January 04, 2016, 03:11:13 am »
What brand is it?  It isn't HTH is it?  If it's HTH, then that's Cal-Hypo and you shouldn't be using that in your spa unless you start with low CH and use this product instead of bleach and keep track of how much you add because for every 10 ppm Free Chlorine (FC) added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppm.

Hot Tub Forum

Re: HTH Super chlorine granules-Shock
« Reply #1 on: January 04, 2016, 03:11:13 am »

 

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