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Thread: Sodium Hypo 1.5g per 100g

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    jay87's Avatar
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    May 2011
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    Sodium Hypo 1.5g per 100g

    Hi All

    I have just opened my hot tub for the season . Am using the dichlor then bleach method so finished with the dichlor, now on to the bleach.

    I'm in the UK. a value brand of bleach says less than 5% Sodium Hypo, but also 1.5g per 100g. Does this mean anything? Any indicator of strength?

    Thanks
    Softub T300 resort 1135l hot tub with ozonator using dichlor then bleach method.

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    Richard320's Avatar
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    Re: Sodium Hypo 1.5g per 100g

    There was a time, way back when I was taking chemistry classes, when I would've been able to figure out molecular weights and so on and figure that out. But that was too long ago.

    It's definitely not straight arithmetic, it's not 15%. My guess, being a discount brand, is that it's somewhere around 3%.

    If EU regulations make finding stronger household bleach impossible, there is the same thing -but stronger - sold for sterilizing dairy equipment. A little online searching turned up 10% and 11.8% Here's just one of the links. If there's a farm supply store nearby, it would certainly be worthwhile to check pricing and availability.
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    JasonLion's Avatar
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    Re: Sodium Hypo 1.5g per 100g

    If 1.5g per 100g is by weight, then it is 1.5%.
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    jay87's Avatar
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    Re: Sodium Hypo 1.5g per 100g

    Hmm. Lucky its not a pool then! Its only 23p (35 cents) for 2 litres so I'm not that fussed. Will just use 2% on the pool calc then

    Thanks Jason and Richard. I'll look into dairy bleach
    Softub T300 resort 1135l hot tub with ozonator using dichlor then bleach method.

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