Magnesium (Epsom Salts) In Hot Tub
Posted 02 November 2012 - 05:02 AM
I searched through the forum and didn't find any recent posts about using Magnesium in a Hot Tub/Spa. The benifits on transdermal magnesium have been studied and proven. Most people are also deficient in magnesium in their bodies. I know I feel so much better after Epsom Salt Baths. My questions are: Does it harm the hot tub? And why do more people not use magnesium in their hot tubs?
Posted 02 November 2012 - 06:30 AM
Then again, you can put whatever you want into your own tub If things mess up you just have to pay for any possible repairs.
Posted 02 November 2012 - 07:20 AM
The main issue with magnesium hardness is that, like calcium, it reduces the surfactant properties of soap and precipitates magnesium stearate with solubility 30 mg/L (this along with calcium stearate with solubility 40 mg/L form "soap scum"). This is not normally an issue in pools and spas since soap is not used and is actually to be avoided since foaming is undesireable. In fact, calcium is intentionally added to spas to inhibit foaming (but the quantities of soap are usually small enough to avoid soap scum) and magnesium would have the same foaming inhibition effect.
Posted 05 November 2012 - 10:10 AM
Posted 05 November 2012 - 12:34 PM
Waterbear: I'll have to look into the correct concentration, but if my memory serves me the concentration they tell you to put into an Epsom Salt bath is roughly between 400-600grams per 600L, which would be about 10Kg on a 400Gallons hot tub if you went on the lower end with 400grams. That is quite a bit. The baths were for 12 minutes at 50-55 degrees celcius, which I believe is warmer than most tubs.
chem geek: wow very techical, so laymens terms......adding magnesium shouldn't be a big issue? I guess it would depend on how much I add right?
spidey9: Yes you are right, that amount of magnesium probably wouldn't do much at all...when I think they are talking about putting 10Kg into a 400G hot tub.
Posted 05 November 2012 - 02:12 PM
Posted 05 November 2012 - 02:16 PM
400 grams in 600 liters is 667 mg/L (ppm) so is not horribly high for magnesium so should not be an issue. A 400 gallon tub is 1514 liters so would need 400*1514/600 = 1009 grams or roughly 1 kilogram. I'm not sure how you got 10 kilograms but you are off by a factor of 10.
haha :-) I made a typo there...its supposed to be 400grams in 60L, not 600L. So my math is right, but my typing is sloppy! :-)
Would the form of magnesium matter? Espsom Salt (Magnesium Sulfate) vs Magnesium Chloride?
Posted 05 November 2012 - 09:21 PM
Posted 06 November 2012 - 08:53 AM
Surprisingly, from the google searches I've done, using Magnesum in spas doesn't seem too common. Considering all the health benifits magnesium supplementation has, I thought more spa owners would have tried this.
Any spa users or dealers with experience can chime in!! :-)
Posted 06 November 2012 - 04:00 PM
Posted 07 November 2012 - 05:28 AM
Posted 07 November 2012 - 06:22 AM
Posted 08 November 2012 - 07:38 AM
Posted 08 November 2012 - 01:02 PM
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