Stains On Plaster
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
I just got my pool re-plastered and in about 3 weeks I'm getting this tan stain on the plaster. Any ideas as to what that could be?
-
- Swimming Pool Superstar
- Posts: 307
- Joined: Wed 17 Feb, 2010 22:47
- My Pool: License # CPO34-283076
- Location: Tampa Bay, FL
- Contact:
Stains On Plaster
fields wrote:I just got my pool re-plastered and in about 3 weeks I'm getting this tan stain on the plaster. Any ideas as to what that could be?
Do you have a heater hooked up to the system? Also, can you post your test results?
pH
TA
CH
CYA
TDS
Metals
FC
CC
Phosphates
Nitrates
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
No, I don't have a heater hooked-up to the pool. The Phosphates were high last week but everything else was good. The chlorine was low after the pool start-up but that is fine now too. I don't remember what the Calcimine hardness was.
Chlorine 5+
Ph 7.2
Total Alkalinityh 80
Cyanuric Acid 40
Phosphates 300
Chlorine 5+
Ph 7.2
Total Alkalinityh 80
Cyanuric Acid 40
Phosphates 300
-
- Swimming Pool Wizard
- Posts: 81
- Joined: Sat 07 Aug, 2010 23:26
- My Pool: 24X52 DIY Concrete and liner
- Location: Raleigh NC
Stains On Plaster
There is a good chance the stain is organic and high levels of chlorine will clear it up.....although it may take a few days. It's a cheap fix, if it works, and easy to do.
Simply elevate your Chlorine to about 8-10ppm and HOLD IT THERE constantly for the next few days. If the stain is organic, it will start to lighten. If it does, hold the chlorine up there until it disappears.
Brushing it often (like once each day) is very helpful, too. Even if it doesn't apperar to be removing it.
If the chlorine has no effect over a few days, post back and we'll try another non-organic approach.
Simply elevate your Chlorine to about 8-10ppm and HOLD IT THERE constantly for the next few days. If the stain is organic, it will start to lighten. If it does, hold the chlorine up there until it disappears.
Brushing it often (like once each day) is very helpful, too. Even if it doesn't apperar to be removing it.
If the chlorine has no effect over a few days, post back and we'll try another non-organic approach.
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
Thank you, I'll give it a try, then let you know.
Stains On Plaster
You can pour muriatic on steps thru the water, The acid is heavier that the water and will find its way down. please be carefull as the acid could splash a drop as your are pouring and possibly get you in the eyes. Wear goggles and hold your breath as well until the little mist of acid clears. If this is iron staining it should go away quickly.
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
I did that and the stain did go away. So how do I do the entire surface of the pool with muratic acid? Would Ascorbic acid achieve the same results?
Thanks!
Thanks!
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
hey duraleigh, i'm still waiting to see what raising my chlorine will do to the stains. i started that on saturday.
-
- Swimming Pool Wizard
- Posts: 81
- Joined: Sat 07 Aug, 2010 23:26
- My Pool: 24X52 DIY Concrete and liner
- Location: Raleigh NC
Stains On Plaster
It seems like you may have already moved to the next step. If it's removed by the addition of acid, it's a pretty decent bet it's metal. You didn't say, but I'm assuming you saw no affect from the chlorine.
Yeah, it can be removed by doing an ascorbic acid treatment. I have not done that treatment but there are a lot of folks that have (and an article, I think) over on troublefreepool.com. metal staining is a little more involved but it can certainly be accomplished.
Yeah, it can be removed by doing an ascorbic acid treatment. I have not done that treatment but there are a lot of folks that have (and an article, I think) over on troublefreepool.com. metal staining is a little more involved but it can certainly be accomplished.
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
No, I have not moved to the next treatment. I'm giving the chlorine several more days. I started the chlorine on Saturday. How many more days do you think that it should be before I might see if this is going to work?
-
- Swimming Pool Wizard
- Posts: 81
- Joined: Sat 07 Aug, 2010 23:26
- My Pool: 24X52 DIY Concrete and liner
- Location: Raleigh NC
Stains On Plaster
Probably, about now. Most organic stains start to lighten from elevated chlorine in the first day and continue to improve slowly.
One thing we haven't explored is calcium scale (which is a metal, too!) Are the stains rough at all? Have you contacted your re-plasterer and asked his advice?
That from my other post is influencing me, too. Organic stains that I am aware of are not affected by the application of acid so I would think it to be metal.If it's removed by the addition of acid, it's a pretty decent bet it's metal.
One thing we haven't explored is calcium scale (which is a metal, too!) Are the stains rough at all? Have you contacted your re-plasterer and asked his advice?
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
Raising the chlorine doesn't seem to be working. The stains are still there and don't seem to be lessening. If it is metal, what can I do about that? I did contact the re-plasterer and their idea was to drain the pool and acid wash it. I would like to avoid that process. The stains are not rough to the touch. Any other ideas?
-
- Swimming Pool Wizard
- Posts: 81
- Joined: Sat 07 Aug, 2010 23:26
- My Pool: 24X52 DIY Concrete and liner
- Location: Raleigh NC
Stains On Plaster
Yeah, it can be removed by doing an ascorbic acid treatment. I have not done that treatment but there are a lot of folks that have (and an article, I think) over on troublefreepool.com. metal staining is a little more involved but it can certainly be accomplished.
-
- I'm new here
- Posts: 8
- Joined: Thu 26 Aug, 2010 08:55
- My Pool: gunite pool - clorine - 13,000 gal
- Location: texaS
Stains On Plaster
Ok, I put 12 gallons of muratic in my pool. Let it sit for 24 hours, then brushed it. Stains are gone and my water is clear. Now I just have to get my PH back up. I'm trying to do that with Borax. I'll let you know how it goes. Thanks again for your help.
Return to “Pool Surface Discussions”
Who is online at the Pool Help Forum
Users browsing this forum: No registered users and 3 guests