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Or try this version. calc.html It has the 8.25% and 121 oz.

I bought a case of this at a Home Depot in central Texas last month, and it was very weak.

Dave, Does adding that one last drop impact the combined chlorine test in any way? i.e. will that extra drop prevent the test from turning pink and throw off your CC drop count? Dennis

:oops: I had not been doing that, but I certainly will from now on. Thanks to you all!

:lol: I hope that truly is the case, but I will try again to be sure.

I haven't dosed since yesterday morning, so it's likely a testing error. I will try again tonight.

I have been lurking for a while now, and I have been on BBB for a couple of months now. This site is an awesome resource, and the people are great! Thanks so much! After getting a lot of rain the past few weeks, I became concerned after seeing what appeared to be the beginnings of algae...

Awesome site! Just donated.

Yes; regular bleach.