another black algea problem

[kingcoota]

http://cloroxprofessional.com/products/ucg_bleach.shtml

This is the bleach homedepot sells

walmart only sells regular chlorox thats almost the same price.

[PoolDoc]

Hi Kingcoota;

I read a lot, and there are a lot of phrases and expressions I like. I encountered one today that's not new, but I don't recall having had a chance to use it . . . but you've provided me with one, so I'm excited.

I checked the link you posted (I do the moderation on all the links, attachments, etc, so if you want a post to get modded quickly, don't put a link, etc. in it!) to Clorox Professional. What I noticed immediately is that the distinction between Clorox and Clorox Professional is a distinction without a difference. (that's the phrase I wanted to use - thx!)

Both are 6% chlorine (wt / vol %). In other words, the only difference is the label, and possibly, the price.

With respect to consumer and small business chemicals, it's the same ol' same ol' -- chemical companies have a relatively small number of useful products and most of them aren't new. So, to create market buzz, they dream up new blends, new labels, and new ways to put an exclamation point in text. And then, they use all this to sell the same old products they always have.

PoolDoc

[CarlD]

I thought they had stuck something in the C-Pro that wasn't pool friendly. I'll have to look next time I'm at the Depot. Didn't Chlorox brand just add another ingredient to their bleach that nobody's certain of whether it's OK in pools or not?

[polyvue]

I thought they had stuck something in the C-Pro that wasn't pool friendly. I'll have to look next time I'm at the Depot. Didn't Chlorox brand just add another ingredient to their bleach that nobody's certain of whether it's OK in pools or not?

Just a little lie.

Uh, I mean, lye.

sodium hydroxide

MSDS

[PoolDoc]

All bleach has a slight excess of sodium hydroxide. It's made by bubbling chlorine gas into concentrated sodium hydroxide. Bad things happen if the sodium hydroxide get used up while the gas is bubbling.

PoolDoc

[AnnaK]

How perfect is that?!

Chem Geek posted a reference to a CYA slurry which dissolves quicker than granular CYA, Patent 6,207,177. The process involves mixing caustic lye with cyanuric acid.

So now we have CloroxPro with lye in a bottle and we have CYA in a plastic jar and there's that old five gallon bucket over by the shed . . .

. . . okay, better not try this at home, huh?

[polyvue]

. . . okay, better not try this at home, huh?

Before answering, could you tell me if I am a named beneficiary in any insurance policy or trust that covers you? heh heh

I never did fully get why folks have to wait up to a week to see all of the CYA show up in test results. The Trichlor powder and CYA flakes (not really granules) I use are all fully testable in an hour or two. In other words, there is no further measurable increase in concentration after a couple of hours following application in warm water. Not what most people say on the forums but true for me nevertheless.



[Edit: Though I have not looked at every single clorox product's MSDS sheet to know this, I presumed that all liquid bleach contained some amount of lye.]