do you think poolstainremovers.com product would remove the stain? I am guessing it is calcium but don't know for sure.
what is the stain on the saltwater fiberglass pool?
- Thread starter larryfortune
- Start date
- Jul 21, 2013
- 64,901
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Welcome to TFP.
Go through the stain identification process...
www.troublefreepool.com
@Texas Splash has gone though stains on his fiberglass pool.
Go through the stain identification process...
Stains in Your Pool
The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.
www.troublefreepool.com
@Texas Splash has gone though stains on his fiberglass pool.
- Jun 22, 2014
- 52,011
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Larry, welcome to TFP! 
In the pics I'm seeing what appears to be some brown spots and perhaps some gelcoat fading. Which one are you concerned about? Or both issues? Also tell us how old this shell is and who was the manufacture if you know. Gelcoats sometimes have a mind of their own, but we'll try to help if we can.
It would also help to see some water testing history. Anything you can show us. Besides the SWG (salt) and acid, any other chemicals used in the water?
In the pics I'm seeing what appears to be some brown spots and perhaps some gelcoat fading. Which one are you concerned about? Or both issues? Also tell us how old this shell is and who was the manufacture if you know. Gelcoats sometimes have a mind of their own, but we'll try to help if we can.It would also help to see some water testing history. Anything you can show us. Besides the SWG (salt) and acid, any other chemicals used in the water?
the pool was installed 2007 by SanJuan. I realized this year I needed to add some calcium hardness (currently 208).
alkalinity is 128
cya 56
ph 7.8
salt 4228...my cell had a calcium buildup and kept calling for salt so I have cleaned the cell and lowered the salt.
I am concerned about the dark...if you see the drains on the angled up from the bottom you will then see a dark line in front of that where the flat bottom begins (that is the dark).
alkalinity is 128
cya 56
ph 7.8
salt 4228...my cell had a calcium buildup and kept calling for salt so I have cleaned the cell and lowered the salt.
I am concerned about the dark...if you see the drains on the angled up from the bottom you will then see a dark line in front of that where the flat bottom begins (that is the dark).
- Jul 21, 2013
- 64,901
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Larry, where did that water chemistry come from?
WE don't put any faith in the accuracy of Pool Store testing. To advice on water chemistry we want to see tests from your own test kit. Either a Taylor K-2006C or TFT Test Kits
WE don't put any faith in the accuracy of Pool Store testing. To advice on water chemistry we want to see tests from your own test kit. Either a Taylor K-2006C or TFT Test Kits
Last edited by a moderator:
the water chemistry above was with the leslie home accublue
I have rerun the test with the taylor and have almost the same...results:
calcium hardness taylor says 280 but my taylor regents are very old and I would trust leslie above more.
alkalinity is 130
cya 50
ph 7.8
I have ordered the jack's magic stain identify kit...will be here on 22nd...do you think that will help/be worth it?
I have rerun the test with the taylor and have almost the same...results:
calcium hardness taylor says 280 but my taylor regents are very old and I would trust leslie above more.
alkalinity is 130
cya 50
ph 7.8
I have ordered the jack's magic stain identify kit...will be here on 22nd...do you think that will help/be worth it?
- May 3, 2014
- 62,659
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
A CH of 280 ppm is essentially your fill water. Are you using softened water for your makeup water due to evaporation?
no i do not have softened water....I had put 18 pounds of calcium hardness in this summer to get it to the mid 200....the calcium hardness had been in the 80s
- May 3, 2014
- 62,659
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
I would check your testing methods. I know of no public water systems in phoenix with that low of CH.
I guess I would like to bring the initial question back to the surface. I am trying to identify the dark area (stain, etc) on the bottom of my fiberglass pool. Can anyone identify from the pictures? Or will the Jack's Magic ID kit work? Or is poolstainremovers.com product known and could help?
- Jun 22, 2014
- 52,011
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Larry, until your ID kit arrives you can try the following DIY tests:
- Rub stain with a Vitamin C tablet (iron)
- Rub stain with a chlorine tablet r sprinkle some cal-hypo on it (organic)
- Put some dry acid (pH Down) in a thin sock or nylon and rub on teh stain (copper).
- Rub stain with a Vitamin C tablet (iron)
- Rub stain with a chlorine tablet r sprinkle some cal-hypo on it (organic)
- Put some dry acid (pH Down) in a thin sock or nylon and rub on teh stain (copper).
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