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Posted by Boden on April 22, 2008, 8:53 pm
Nancy Young wrote:
>
>
>>Got a pool question - of sorts. Given the high cost of electricity here
>>in
>>the northeast, I was thinking or running my pool filter motor at night to
>>get the off-peak rates. So, my question - Is my family going to swim in
>>emerald green water all summer as a result? Has anyone thought of doing
>>this?
>
>
> Sure, I've been doing that for years, running the pool filter at
> night when the rates are lower. No green water.
>
> nancy
>
>
If green water is an issue it is algae that you need to control. I've
had pools for years and have watched in amazement as my neighbors became
slaves to their pools. Chlorination, at modest levels is one way of
controlling bacteria, etc., but, it is not the most effective way of
dealing with algae. Chlorination is not nice if your users relieve
their bladders in the pool as it then yields chloramines which irritate
eyes.
Algae requires phosphorous to grow. Phosphorous gets in to your pool in
a myriad of ways, including dust and dirt that is blown in with the
wind. A small amount of lanthanum carbonate, mixed to form a slurry and
the poured into the pool or skimmer is a good way to eliminate algae.
The lanthanum binds the phosphorus so that it is no longer available for
the algae to use it. I don't believe Lanthanum is toxic, nor is it
very expensive.
Leslie's used to sell lanthanum carbonate. The last time I was there
you had to buy a lot of other "stuff" with it that ran the price up for
no good purpose.
Boden
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Posted by Jerry on April 22, 2008, 7:05 pm
> Hey Guys -
> Long time no post (I mean REAL long time).
> Got a pool question - of sorts. =A0Given the high cost of electricity here=
in
> the northeast, I was thinking or running my pool filter motor at night to
> get the off-peak rates. =A0So, my question - Is my family going to swim in=
> emerald green water all summer as a result? =A0Has anyone thought of doing=
> this?
5 year old pool in Phoenix AZ. Pool builder's startup guy set the
timers to run at night, left them that way ever since. Never a green
pool. Well, other than the fact that the Pebble Tec finish is green.
<G>
Speaking of electric rates, the local utility, Salt River Project,
just sent around a letter announcing their new rate plan. Used to be,
they had 2 rate periods - Winter (NOV-APR) and Summer (MAY-OCT).
Summer air conditioning season, of course was higher. They have now
added a third rate period, Peak Summer (JUL-AUG). That's when the
temperatures here hit 110 or more. I can hardly wait to see what my
Peak Summer electric bill looks like.
Jerry
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Posted by Richard J Kinch on April 23, 2008, 1:28 am
My Name writes:
> So, my question - Is my family going to swim in
> emerald green water all summer as a result? Has anyone thought of
doing
> this?
I used to follow the "run during daylight" doctrine.
Then I thought, why not let the stuff grow in the daylight, and give it
a whallop of filtering and chlorination at night, when the chlorine
isn't dissipated by sunlight. In theory it should sterilize the pool of
both microbes and algae during each night, and algae can't really get
going too much from zero in one day. And nighttime chlorination is so
much more effective, more sanitizing power per dollar, than during the
day.
Now this won't do for a public pool where you have to keep the water
sterile during daylight usage. You gotta have chlorine and filtering
then to take care of all the "cheek wash".
But it certainly works well, and economically, for my residential pool,
to run only about 6 hours from dusk. On occasions when there is
daylight bathing load, we turn it on manually.
(This is a pool with a chlorine generator.)
http://www.truetex.com/poolcontrol.htm
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Posted by Peabody on April 25, 2008, 5:28 pm
Richard J Kinch says...
> My Name writes:
>> So, my question - Is my family going to swim in emerald
>> green water all summer as a result? Has anyone thought
>> of doing this?
> I used to follow the "run during daylight" doctrine.
> Then I thought, why not let the stuff grow in the
> daylight, and give it a whallop of filtering and
> chlorination at night, when the chlorine isn't
> dissipated by sunlight. In theory it should sterilize
> the pool of both microbes and algae during each night,
> and algae can't really get going too much from zero in
> one day. And nighttime chlorination is so much more
> effective, more sanitizing power per dollar, than during
> the day.
Well, it's more effective if you're still not using
stabilizer. Would this still work if you were using
stabilized chlorine at night?
And, I'd also like to second the idea of whoever suggested
controlling phosphates as a way to control algae. In my
experience this works quite well. The product my pool store
carries is PhosFree. Superchlorinating can remove nitrogen
compounds, but apparently doesn't burn off phosphates at
all.
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Posted by My Name on April 28, 2008, 1:56 pm
I'd like to thank you all for the great information you gave on this
subject. I have had a pool for 20 years and never heard of the phosphate
thing before - I'll have a pointed discussion with my pool store about that
one. I'll follow up with the group in a couple months, the cover won't
come off until memorial day week end.
Thanks again.
frank
orlando
at
sbcglobal
dot
net
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