The Great Nature2 Debate

[waterbear]

My test Numbers:
FC 1ppm
PH 7.5
TA 130
CYA 40

My pool is only open for the summer I close it in September and re-open in June.
This year I started with the cartridge that I put in last august and that will most likely last till this august.
So i replace them every 5 months of use.
It works for me as Im using less chlorine than i hear some people using.
Their website says that nothing effects the life of the cartridge, so I cant see an issue with removing it at the end of the season and re-using it in the the spring.


Above ground pool 6600 gallons
Hayward super pump
Hayward EC50 DE filter

According to the newest info on the Zodiac website the cartridge should be replaced every 6 months or 1 season, whichever is shorter. (which is what the cart instructions have said for the past several years) It says nothing about keeping a cart stored to use the next season.
http://www.nature2.com/files/TL2800_...ers_Manual.pdf

The 'spring cart' you use for startup is actually a lanthanum based phospahte remover in cart form. The price is a bit high for a phosphate remover since 2 liters of Natural Chemistry's PHOSfree is available for about $20-$25 and will treat between 20 and 40k gallons of water. House brand lanthanum phosphate removers are usually even less expensive.
Then again, there is no real need for phosphate removers if the chlorine is kept at proper levels, and the proper use of chlorine is much less expensive than using phosphate removers.

[CarlD]

Now I'm on pins and needles for Ben's explanation!

I do worry that BritinUSA is taking a risk with an FC of 1 and a CYA of 40. But I'm not a chemist or biologist so maybe I'm missing something.

BritinUSA--with that FC of 1 do you also have a CC of 0?

I like to think I'm open-minded so if there's an explanation that explains this experience I really want to know it so we can help others duplicate it.

[PoolDoc]

It's probably going to be Monday.

I've got to read thru Richard's replies, think about them, read thru some stuff online and so on.

Ben

[PoolDoc]

Just lining up ducks . . .

Nature2 Patents:


5352369-Henig-Fountainhead-Method of treating water
http://www.freepatentsonline.com/5352369.html
http://www.freepatentsonline.com/5352369.pdf

5660802-Henig-Fountainhead-Water purifier
http://www.freepatentsonline.com/5660802.html
http://www.freepatentsonline.com/5660802.pdf

5766456-Denkewicz-Fountainhead-Water purifer for a pool
http://www.freepatentsonline.com/5766456.html
http://www.freepatentsonline.com/5766456.pdf

5779913-Denkewicz-Fountainhead-Water purifier for a spa
http://www.freepatentsonline.com/5779913.html
http://www.freepatentsonline.com/5779913.pdf

5858246-Henig-Fountainhead-Method of water purification with oxides of chlorine
http://www.freepatentsonline.com/5858246.html
http://www.freepatentsonline.com/5858246.pdf

6093422-Denkewicz-Zodiac-Biocidal compositions for treating water
http://www.freepatentsonline.com/6093422.html
http://www.freepatentsonline.com/6093422.pdf

6200487-Denkewicz-Zodiac-In-line,in-pool water purification system
http://www.freepatentsonline.com/6200487.html
http://www.freepatentsonline.com/6200487.pdf

6254894-Denkewicz-Zodiac-Silver self-regulating water purification compositions and methods
http://www.freepatentsonline.com/6254894.html
http://www.freepatentsonline.com/6254894.pdf

6524540-Henig-Biocatalytica-Materials and methods for water purification
http://www.freepatentsonline.com/6524540.html
http://www.freepatentsonline.com/6524540.pdf



PoolDoc

[PoolDoc]

More ducks . . .

Zodiac Pool Systems EPA registrations from http://ppis.ceris.purdue.edu/ :


Interestingly, there does not appear to be an active sanitizer registration for Zodiac involving monopersulfate.

Firm Number: 67712
ZODIAC POOL SYSTEMS, INC.
6000 CONDOR DRIVE
MOORPARK CA 93021
805/529-2000

Number of Selected Products: 3


NATURE2 G45-VC40
Registration Number: 67712-1
Status: Active
Approval Date: 11-21-02
Product Manager: Marshall Swindell (703)308-6341
Percent Active Ingredient
8.2300 Copper sulfate pentahydrate (24401)
3.5100 Silver (72501)


NATURE2 AG
Registration Number: 67712-5
Status: Active
Approval Date: 11-21-02
Product Manager: Marshall Swindell (703)308-6341
Percent Active Ingredient
9.4300 Copper sulfate pentahydrate (24401)
2.3300 Silver (72501)


NATURE2 SPA
Registration Number: 67712-15
Status: Active
Approval Date: 02-16-06
Product Manager: Marshall Swindell (703)308-6341
Percent Active Ingredient
0.9200 Silver (72501)

[PoolDoc]

The MPS / Nature2 Missing Registration Mystery

Searching in Purdue U's database of EPA registrations
http://ppis.ceris.purdue.edu/htbin/epachem.com
for:

Potassium monopersulfate
Oxone (Dupont trade name)
37222-66-5 CAS number

I came up with zip.

BUT, Nature2 claims to have a registered spa sanitation system, involving MPS
http://www.nature2.com/spaproducts/nature2spa.asp
"If used with MPS, the most recommended spa oxidant, Nature2 Spa becomes a complete spa sanitizing system - the only non-chlorine spa sanitizing option available. And managing your spa is easier than ever; Nature2 Spa slips into your spa filter and lasts up to four months."


http://apps.cdpr.ca.gov/cgi-bin/labe...l?prodno=54550

I did find a more complete set of approved labels, with other information. I'll have to explore this later:
http://apps.sd.gov/doa/prrs/search/P....asp?key_m=779

Found the MPS Spa "recipe":
https://apps.sd.gov/doa/PRRS/ImageVi...47156&Type=pdf

That's all for tonight.

[waterbear]

Ben, I sent you a PM.
Also, check out this thread which had both the old and new spa low chlorine recipes in it.
http://www.poolforum.com/pf2/showthread.php?t=5446
I posted it in 2006 when Zodiac changed the instructions and came out with the "NEW" low chlorine recipe which works out to maintaining about a 2-3ppm FC in the spa and shocking to about 10-12 ppm as compared to the "OLD" recipe that shocked the spa to 6 ppm on startup, kept a .5 ppm residual, and "as needed shocking" to 2 ppm. Wonder why they made the change in 2006?
Interestingly enough, the current spa instructions on the US website have a 2007 copyright and they have upped the 'as needed shocking" with dichlor to a higher FC level, about 10-12 ppm. Hardly a low chlorine recipe at all.
In the original recipe MPS was an option for the as needed shocking, in the 2006 and 2007 instructions the use of MPS as shock is no longer done but dichlor is used instead.

Also, here is an interesting link from Zodiac Australia. It is the Australian instructions for the N2 express. FC is kept at a minimum of 1 ppm and higher levels for indoor or stabilized pools. They then go recommend stabilizer levels of 50 ppm! (Is this a sneaky way to say that FC needs to be higher than 1 ppm with a N2?)
http://www.zodiac.com.au/media/29825...s%20manual.pdf
I know that the APVMA (Australian government entity that controls pesticides and swimming pool chemicals, much like our own EPA,except their guidelines for pool and spa sanitizers seem to be more stringent than ours) did recall the Nature2 in 2004 because of the very low chlorine levels they were suggesting (much like the US instructions still do)
http://www.apvma.gov.au/publications...tte0403p14.php
They also recalled the N2 spa carts because of the MPS only options (which changed in the US in 2006 to require chlorine in the recipe for shocking)
http://www.apvma.gov.au/publications...tte0406p26.php