Bleach % Question

[Mr. Blue]

So I have been getting interested the the BBB method. I checked out the Pool Calculator and downloaded the iPhone app today.

I decided to run over to my grocery store to check prices on bleach, borax, etc. All of the bleach I found (went to multiple stores) was 8.25%. I notice on the Pool Calculator that you can enter any value into the % bleach field, yet in the iPhone app, there are only a few options to choose from...8% being the highest. Now I suspect it could just be an issue with the app, as the last time it was updated was 2011 :?, but I wanted to make sure I wasn't getting confused here.

Any thoughts?

 

[pwrstrk]

It shouldn't make a difference.


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[Mr. Blue]

It shouldn't make a difference as in use 8% for the calculation, even if the bleach I am using is 8.25%?

 

[frustratedpoolmom]

nope close enough not to worry. Hopefully they'll fix it so there's no confusion.

 

[JasonLion]

Correct. The difference between 8% and 8.25% is significantly smaller than the error in test results, the error in measuring the amount of bleach added, and error in figuring out what % the bleach actually is compared to what it is labeled. Between the various sources of error, you will never notice a 0.25% either way.

 

[pwrstrk]

I've done it that way with the phone app with no problems. You can always use the pool calc. com.


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[Mr. Blue]

Good to know. Thanks, everyone.

Not holding my breath for an update to add iPhone 5 app support either. :lol:

 

[ROTJob]

I too have found 8.25% bleach in the store today. Walmart great value brand of all things. Anyone have any info on why the sudden increase in yield? It reeks of bad information to me, but I am skeptical of most good news.

 

[jblizzle]

Cheaper to ship to the stores because it ways less. In reality the new 8.25% also has slightly less total chlorine for the same price since the volume went down more than the % went up.

 

[Mr. Blue]

Hmm. I did notice a line that said: Yields 7.85% available chlorine.

Photo: http://i.imgur.com/Q6NiO59.jpg

 

[JasonLion]

The by weight percentage, i.e. 8.25%, is what we use around here. The available chlorine number is always lower and should be ignored (unless you are into advanced chemistry).

 

[Mr. Blue]

I see, kind of what I was thinking. Not quite into advanced chemistry...just enough to keep my pool sparkling. :lol: