Plaster Staining Identification

mjpohl

Active member
Feb 24, 2019
39
Rogers, Arkansas
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-30
This season I started noticing a light brown to light tan staining on some areas of my plaster. My pool is only 1.5 years old and I keep up well with balancing and brushing. My only struggle has been PH which I am constantly bringing down from 8.0. I've brushed it and nothing happens. I'm considering testing for metals since I've read copper and iron can be possible causes.
Any other ideas? If I test for metals is there a kit you recommend?

I have included a pictures (don't mind the debris i'm vacuuming currently)
Current Levels
FC: 4.5
CC: 0
CYA: 60
CA: 170
Salt: 3500
ALK: 80
PH: 7.4

IMG_5602.jpeg
 

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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,064
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Read...

 

Gingermom

Member
Sep 16, 2017
15
Houston, TX
Read...

That article does not have any pictures - so it doesn't really help identify. I have similar spotchy spots. The unhelpful comment I got from the pool people was plaster just does that with age, you should have gotten a different finish. So are there pictures of the various stains to help with identification, or is it just try and see what works? I did try the chlorine tab on what I knew was an organic spot - now I have a yellow circle in my deep end where the tab sat. Any thoughts on that?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,064
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
You try it and see what lifts the stain.

How long did you let the tablet sit for? You should only put it on the stain for a few minutes 2 to 3.
 
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