10% bleach

[Poconos]

Since Shelly brought up the issue of Walmart bleach, I should say something now. I'll start a separate thread soon if I find something odd. A few weeks ago checked a sample of the 6% Ultra and found it somewhere just nder 3%. Kept thinking I was doing something wrong. Tried again today, different batch of bleach, two different dilution techniques to get a 10,000:1 reduction and came up with 2.8 & 3% respectively. 1st try was a two step, 10:1 reduction then a 1000:1 to get the 2.8%. Next tried a 10,000:1 directly using a 1000 ml fleaker and an insulin syringe to get an accurate 0.2 ml bleach volume. result was 3%. Now I'm wondering what's up with the Walmart stuff. Also plugged the numbers into Michaels bleach calc and got about the same concentration knowing how much 174 oz raises the pool. Next time at Malwart I'm getting a small jug of their generic and one of Clorox and will check them both.
Al

[ShelleyAnn]

Oh I am sooooo eager to see how your experiment comes out! Wouldn't doubt the generic stuff would loose so much considering WalM and the path it takes. I'm thinking I'll truly get very very close to 10% with this suppier.

Shelley

[Jakebear]

Next tried a 10,000:1 directly using a 1000 ml fleaker and an insulin syringe to get an accurate 0.02 ml bleach volume. result was 3%. Now I'm wondering what's up with the Walmart stuff.

Is your mix ratio correct?? --- I use .1 ml bleach in a 10L sample of my well water (no chlorine to start) this gives me a free Cl of 5.8ppm with fresh Clorox Ultra consistently. You need .00001L/L to do the ratio

I derived my mix from Carl's 1.88 per 5gal h20

http://www.poolforum.com/pf2/showthr...highlight=1.88

If I'm wrong please let me know!!

[Poconos]

You're diluting more than me. 100,000:1 with the 0.1 ml per 10L ratio. Diluting 10,000:1 with 6% should yield a 6 ppm concentration.
6% is 60,000 ppm so dividing by 10,000 is 6 ppm. I actually did a 5000:1 dilution for the check which should have yielded a 12 ppm concentration.
Likewise, if I'm doing something really stupid I'd sure like to be enlightened. Fact that the rise in FC in the pool after adding a big jug is about what is expected if the bleach is 3%.
My friend grabbed a jug of Clorox at K-mart today so I'll try that tomorrow.
Al

[Poconos]

Just a followup....results of checking Clorox vs Walmart bleach are inconclusive. Not sure why but the results are all over the map in spite of trying to be as precise as possible with the dilutions. All I can say is I never got any bleach concentration at or above 5.25% with any samples. Wish I had a pool store closeer than a half hour away but in any case next time I'm there I will check on the higher concentration stuff.
Al

[Phillbo]

I'll bet the walmart stuff sits on a dock or in a wharehouse for a long time before being shipped to the stores.

[Spensar]

I'll bet the walmart stuff sits on a dock or in a wharehouse for a long time before being shipped to the stores.

Then again, they do such massive volumes, there is a great chance it is fresher than anywhere else. Walmart also has very tight inventory controls and doesn't have months of commodity products like bleach sitting in warehouses tying up room and cashflow.