brown spots on bottom of my pool

Stains on the pool surfaces, pool equipment or on the swimmers, or off-color swimming pool water. Discolored but clear water.

brown spots on bottom of my pool

Postby craig » Thu 16 Aug, 2007 19:23

Hello to all, and thanks for any help on our problem. We have a 27 ft round 54 inch deep pool that has brownish spots all over the bottom of pool they look like stains, I tried to scrub them off no luck its looks like stains in the liner. I've tried to shock it to ,no luck. I took a water sample to local pool shop and this was the readings free chlorine 4.7 total chlorine 4.7 , stablizer 61 , ph 7.1 , alkalinity 100, ca hardness 150.00 iron 0.2, copper 1.7. I have to say we a nature 2 mineral water purifier that has copper and silver in it . The copper level was real high according to pool rep and she thought it was because ph was to low so she wants me to get ph up to 7.6, shock the pool and see what happens before using a stain removal. also they thought it couldn't be algae under pool liner, they said liner was to thick to bleed through. I live in the pittsburg pa. area, any help on this would be greatly appreciated thanks Craig
craig
 

Postby Backglass » Thu 16 Aug, 2007 19:40

Hi or low ph doesn't magically create copper. You copper is high because of the Snake Oil (my opinion) mineral system you are using. You are running a real risk of green haired guests with those levels. :shock: You don't need it as you wont get algae with a properly chlorinated pool, as your's is.

I would bet money your stains are metal, most likely the copper or possibly the iron. The way to find out for sure is to put on your mask and place a plain old Vitamin C tablet on the stain. If you magically see it disappear, you have metal staining which can be removed with an ascorbic acid treatment DETAILED HERE.
===============================
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thanks

Postby craig » Thu 16 Aug, 2007 20:31

Thanks I'll try the c tablet tomorrow I'll let you know . Thanks craig
craig
 

stains ?

Postby craig » Fri 17 Aug, 2007 14:56

Hello WE tried the vitamin c tablet about 10 of them, my boys said it appeared to them to have no affect on these shadows, stains, I have to say since I really shock the pool and added ph plus they are getting a lot lighter, but also a few days ago I spread algae stop from hth all around the outside of pool and watered it well, we have marble stones all around the pool 2-5 inches in diameter just not sure what to think it still might be algae under liner but pool supplier said there was no way it would bleed through.but read on net that they could, if it is algae under liner would putting liquid clorax all around outside of pool kill the algae under liner.the liner is 3 years old from aqua-leader 20 mil. I like to add when I open the pool each year these spots are not there then as season goes on they appear. thanks for any help . sincerely Craig
craig
 

Re: stains ?

Postby Backglass » Sat 18 Aug, 2007 09:50

craig wrote:Hello WE tried the vitamin c tablet about 10 of them, my boys said it appeared to them to have no affect on these shadows, stains, I have to say since I really shock the pool and added ph plus they are getting a lot lighter, but also a few days ago I spread algae stop from hth all around the outside of pool and watered it well, we have marble stones all around the pool 2-5 inches in diameter just not sure what to think it still might be algae under liner but pool supplier said there was no way it would bleed through.but read on net that they could, if it is algae under liner would putting liquid clorax all around outside of pool kill the algae under liner.the liner is 3 years old from aqua-leader 20 mil. I like to add when I open the pool each year these spots are not there then as season goes on they appear. thanks for any help . sincerely Craig


Well, it definitely isnt metal then as the vitamin C tablets work instantly on metlal stains.

OK...step two is to place a chlorine puck on the stain and leave it there for awhile. If the stain lightens or goes away, it's an organic stain and you might have some luck with super-shocking the pool.
===============================
I'm no expert...just a long time pool owner. The real experts are at www . troublefreepool . com

Download Bleachcalc free at troublefreepool . com /files/BleachCalc262.exe and start saving money on chemicals.
Backglass
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Posts: 727
Joined: May 2007

brown spots on bottom of my pool

Postby craig » Sat 18 Aug, 2007 14:15

Hello, Thaks again for all the help, Yes the chorine tablets do work the vinyl liner under tablets come real clean, I have to say this is not a real dark stain it allmost looks like a shadow on your pool bottom in spots, now what should I use next. the chorine leve is real high in pool right now but probably not enough to get rid of this stain/algae, would liquid gold algacide work,I have put 3 gallons of liquid clorax in pool in last 3 days this may be why shadows have lighten in color. thanks again for help. Craig
craig
 

brown spots on bottom of my pool

Postby POOLGRL » Fri 17 Jul, 2009 09:16

In response to Craig, you should be careful of putting the chlorine tabs on the stain directly because this may burn a whole in your vinyl liner. I have the same exact problem occuring in my pool and it's got us stumped. We tried shocking the pool and raising the chlorine very high - that did not work. Then we added MetalX for the stains assuming it was a metal stain. This dropped our ph very low. That did not work so I had to work on raising my ph level again and my alkalinity and chlorine. I FINALLY have my pool balanced again but the stains are still there. I think they are bleeding thru the bottom. Not sure what I'm gonna do now. Any ideas would be great.
POOLGRL
 

brown spots on bottom of my pool

Postby Sean » Thu 06 Aug, 2009 06:13

I use a citric acid based stain remover. (available from pool chem shops)
It brings it up like new.
I also have Nature2 and am now pretty sure it is the cause.
I am going to plumb it out and get rid of it.
Sean
 

brown spots on bottom of my pool

Postby shady bottom too? » Mon 10 Aug, 2009 08:02

POOLGRL wrote:In response to Craig, you should be careful of putting the chlorine tabs on the stain directly because this may burn a whole in your vinyl liner. I have the same exact problem occuring in my pool and it's got us stumped. We tried shocking the pool and raising the chlorine very high - that did not work. Then we added MetalX for the stains assuming it was a metal stain. This dropped our ph very low. That did not work so I had to work on raising my ph level again and my alkalinity and chlorine. I FINALLY have my pool balanced again but the stains are still there. I think they are bleeding thru the bottom. Not sure what I'm gonna do now. Any ideas would be great.


I have the same problem. I thought using the chlorine tab seemed to make it lighter. I guess the maybe using super chlor to shock might work? Any other suggestions?
shady bottom too?
 

brown spots on bottom of my pool

Postby craig l » Mon 28 Sep, 2009 18:40

Hi, You might be surprised to hear the stains might be under your liner, mold or algae , that makes your liner look like dark shadows .I know ,I have them on my liner.really no solution for this problem.Craig
craig l
 

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