Fiberglass Pool Staining
- Thread starter sannese
- Start date
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Welcome to TFP! 
A few questions for you:
1 - How old exactly is this pool?
2 - What chemicals have been added to-date?
3 - We need to see a full set of water test results. Leslie's testing (and advice) is horrible. If you don't already have a TF-100, TF-Pro Series, or Taylor K-2006C test kit, that needs to be step #1.
4 - Have you tried any other DIY test methods on that stained area other than the Vitamin C?
5 - What factory color is that shell? Is it white or just a very light blue?
A few questions for you:1 - How old exactly is this pool?
2 - What chemicals have been added to-date?
3 - We need to see a full set of water test results. Leslie's testing (and advice) is horrible. If you don't already have a TF-100, TF-Pro Series, or Taylor K-2006C test kit, that needs to be step #1.
4 - Have you tried any other DIY test methods on that stained area other than the Vitamin C?
5 - What factory color is that shell? Is it white or just a very light blue?
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Also be sure to update your signature. Below should help.
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Probably a stupid question, but that looks kind of like the grunge I get above the waterline in my fiberglass pool that’s just dirt and body/suntan oils. Have you gone at it with a magic eraser?
1. The pool is brand new... A year old.Welcome to TFP!
1 - How old exactly is this pool?
2 - What chemicals have been added to-date?
3 - We need to see a full set of water test results. Leslie's testing (and advice) is horrible. If you don't already have a TF-100, TF-Pro Series, or Taylor K-2006C test kit, that needs to be step #1.
4 - Have you tried any other DIY test methods on that stained area other than the Vitamin C?
5 - What factory color is that shell? Is it white or just a very light blue?
2. Chemicals added is only salt for the saline system and shock.
3. Where can I get a TF-100?
4. I just ordered 8lbs of vitamin c to see if that does the trick along with Culinator
5. The factory color of the shell is white.
Yes, I tried magic eraser, no good. To me it looks like Iron, but Leslie's pool test shows .1 ppm which is in-line.
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Here you go. You might take note of the Pro Series kits as well and compare for yourself all options. You definitely want the speed/smart stir. It's a game changer.
Test Kits
- May 27, 2021
- 1,306
- Pool Size
- 17000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Why?
Why not identify the cause of the stain first, then treat what it ACTUALLY is instead of a knee jerk reaction. Try this from Jacks to identify the staining, then treat it appropriately.
The Absorbic Acid did the trick, I would say it's 99% gone when I applied the 8lbs of Asbsorbic Acid to the water. I'm hoping that coupled with the CULator metal remover that it does the trick and stays clean.
Thank you guys!
Thank you guys!
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Nice. Well, at least now you know you do indeed have iron in the water. Some city water sources do have higher levels, and it just keep building up. Now you have to be careful because that iron is still in the water ready to attach itself again. Some people exchange the water at this point, but I doubt you will do that now. So with a proper test kit, keep a very close eye on the pH and FC levels. You must avoid algae, but don't want to e FC too high either. Refer to the FC/CYA Levels. The pH can't go over 7.8 either or it can aggravate the iron. Your other option is to use a sequestrant on a recurring basis.
Perhaps in the fall you can lower the water level a lot before closing and get some free rain and snow (iron-free) to fill it back up?
I'm running CULator in the pump filter which should absorb the iron (Starter Kit - CuLator Metal Eliminator and Stain Preventer). I've used this in the past with my old pool and it successfully removed the copper from the pool without the need to drain the pool. So far, so good and may need to hit it with another dose of Absorbic Acid for any of the metal that got "thru"?
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus