Is this possible?

[mccato]

Thanks, Richard. I used 15 pounds of dichlor when I did use it; so your calculations make me feel better! The idea of using a plastic sheet to add water to the top while draining from underneath sounds good too. I've just not been able to find a sheet of plastic that's big enough!

[chem geek]

Take a look at this thread especially on the third page and later. Though this looks like a scene out of Cocoon, you could use large plastic garbage bags instead of a plastic sheet (or tarp). If you come up with a creative solution and you think it looks funny, be sure to post some pics if you can so we can all get a good laugh. The technique does work, but it can sure look strange!

Richard

[mccato]

Thanks again, Richard! That's a very entertaining group of posts! Gives me lots of good ideas! I'll be sure to post pics if I think of something worthy!

[mccato]

OK, in my constant search for more information about the CYA beast, I found this - It's $50 per gallon at In The Swim:

Cyanuric Acid Remover

A REVOLUTIONARY SOLUTION TO "OVER-STABILIZATION" IN SWIMMING POOLS & SPAS!

Quickly reduce the level of cyanuric acid to comply with local codes, and avoid costly water problems.

Eliminate the time consuming process of draining and re-filling the pool.

Will not affect the water balance chemistry when used as recommended.

Pool can be open again only 15 minutes after application.


Dosage: One gallon of Cyanuric Acid Remover per 10,000 gallons of pool

Of course the ingredients are not listed anywhere that I can see. Does anyone have any idea what this stuff is?

[doggie]

I don't know. But it seems a bit suspicious that only intheswim and waterwarehouse sells it. All other sites say the only way to reduce your cyanuric acid is by replacing water.

In my opinion, it would be a waste of money. I'd stick to the tried and true.

[hamop78]

I've seen posts on other forums that say it is melamine -- the reagent used in your test. Allegedly, the person who assisted in the development of the product denied that emphatically. I suppose you could demand an MSDS if you buy the product but you should know that the MSDS only shows hazardous materials but even that is not available if it is a trade secret.

If you want to try draining -- an alternative to the sheet method is a Silage Bag, available from a farm supply. These are heavy plastic bags that come in various sizes. A 8'X20' bag will hold in the neighborhood of 7500 gallons.

[mccato]

Thanks to both of you. I wrote to In The Swim and asked for the ingredients, but they say "I cannot divulge the ingredients in the product because the manufacturer does not provide them at this time." I also asked if it's guaranteed to lower CYA, and they said No! So I guess I'll get the Silage Bags and get to work!

[chem geek]

The In The Swim page for the Cyanuric Acid Remover shows the brand name on the bottle of Clormor. The www.chlormor.com web page is under construction and also says "Zyme Pool & Spa Chemicals". However, this cached web page shows that the chlormor domain was transferred from allchem.com and this company claims they are a distributor of pool chemical products yet their product list does not show the Cyanuric Acid Remover product. So I can't find the original manufacturer source, but agree with others that this is just melamine.

Richard