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Swimming pool, PH and muriatic acid ...
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beav
science forum addict


Joined: 18 Oct 2005
Posts: 63

PostPosted: Wed Jun 14, 2006 3:09 pm    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

On Mon, 12 Jun 2006 23:33:23 +0200, "Noproblem"
<noproblem@NOSPAMMMMMMinterfree.it> wrote:

Quote:
I bought a swimming pool with 24 cubic meters of water.

For lowering the PH of the water (I have to keep it in the range 7.2 - 7.6)
a specific solid product should be used, like this:

http://www.poolsinc.com/chem_bal3.html

I read somewhere that I could use the muriatic acid, that is cheaper.

Can you tell me the exact quantity of muriatic acid should I add to my water
for decreasing the PH by 1/10?

I repeat: decreasing by 1/10 the PH for 24 cubic meters of water.

Thanks in advance.


get off the chemical treadmill...

add a ppm or two of Cu as CuSO4. it eliminates the algae and
disnfects bacteria. it also reduces the amount of Cl you need to add
to maintain a 2-5ppm residual. it buffers the pH by moving between
SO4 and HSO4 as the pH moves in either direction.
>
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Borek
science forum Guru Wannabe


Joined: 02 May 2005
Posts: 157

PostPosted: Wed Jun 14, 2006 4:51 pm    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

On Wed, 14 Jun 2006 17:09:42 +0200, beav <BEAVITH1@NETSCAPE.NET> wrote:

Quote:
add a ppm or two of Cu as CuSO4. it eliminates the algae and
disnfects bacteria. it also reduces the amount of Cl you need to add
to maintain a 2-5ppm residual. it buffers the pH by moving between
SO4 and HSO4 as the pH moves in either direction.

At ppm concentrations and at pH close to 7 SO4-2/HSO4- buffering effect is
hardly detectable.

http://www.chembuddy.com/?left=pH-calculation&right=pH-buffer-capacity

Take a look at the plot, but move peak 2.75 unit to the left (pKa2=2).

Best,
Borek
--
http://www.chembuddy.com
http://www.ph-meter.info/pH-meter-construction
http://www.terapia-kregoslupa.waw.pl
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Richard J Kinch
science forum beginner


Joined: 26 May 2005
Posts: 36

PostPosted: Thu Jun 15, 2006 5:40 am    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

beav writes:

Quote:
add a ppm or two of Cu as CuSO4

Not as effective as chlorine.

Substantial risk of staining your pool a dingy green. In fact it is
inevitable given enough time.
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beav
science forum addict


Joined: 18 Oct 2005
Posts: 63

PostPosted: Thu Jun 15, 2006 2:48 pm    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

On Thu, 15 Jun 2006 00:40:04 -0500, Richard J Kinch
<kinch@truetex.com> wrote:

Quote:
beav writes:

add a ppm or two of Cu as CuSO4

Not as effective as chlorine.

Substantial risk of staining your pool a dingy green. In fact it is
inevitable given enough time.


i used CuSO4 in a vinyl lined pool for 5 years. Calculate the volume
of the pool, figure the weight of, go crazy, 2 ppm CuSO4 * 6H2O, mix
it in a pail and spread it over hte surface of the water.

voila!

i never had any problems. regular vacuuming/backwashing was
necessary, but i never shocked, never buffered, only used a fraction
of my neighbors Cl consumption, never had kids with red eyes.

i used to laugh at watching him use his test kits. never used them,
never needed to. sparkling water every day.


whatever happened to those electrical colloidal silver generator pool
sanitizers? how much different can that be than using CuSO4 over the
side?

right! using Cu would be much cheaper. and simpler. cheaper and
simpler works for me.
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Richard J Kinch
science forum beginner


Joined: 26 May 2005
Posts: 36

PostPosted: Fri Jun 16, 2006 5:35 am    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

beav writes:

Quote:
whatever happened to those electrical colloidal silver generator pool
sanitizers?

Those are quack devices.
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Borek
science forum Guru Wannabe


Joined: 02 May 2005
Posts: 157

PostPosted: Fri Jun 16, 2006 11:35 am    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

On Thu, 15 Jun 2006 16:48:50 +0200, beav <BEAVITH1@NETSCAPE.NET> wrote:

Quote:
CuSO4 * 6H2O

5H2O

Best,
Borek
--
http://www.chembuddy.com
http://www.ph-meter.info/pH-meter-construction
http://www.terapia-kregoslupa.waw.pl
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beav
science forum addict


Joined: 18 Oct 2005
Posts: 63

PostPosted: Fri Jun 16, 2006 6:05 pm    Post subject: Re: Swimming pool, PH and muriatic acid ... Reply with quote

On Fri, 16 Jun 2006 13:35:19 +0200, Borek
<m.borkowski@delete.chembuddy.these.com.parts> wrote:

Quote:
On Thu, 15 Jun 2006 16:48:50 +0200, beav <BEAVITH1@NETSCAPE.NET> wrote:

CuSO4 * 6H2O

5H2O

Best,
Borek

right. thanks.
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