White spots

Rick T

Well-known member
Apr 28, 2019
109
Houston, TX
I wasn't sure which category to post this in as I do not believe this is an algae problem. In February I had my pool resurfaced with Quartzscape in French Gray. On both the floor and walls I have these white spots/blotches cover a high percentage of the pool area. I have scrubbed them but nothing happens. It does not appear to be a growth of any kind. Oddly enough the attached spa does not have this issue. I rarely use powdered shock. I have contacted to plaster company to come take a look (the 1st pic has a shadow of a palm tree). Any ideas?

pool 2.jpgpool 3.jpg
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
20,466
Northern NJ


@onBalance spot etching?
 

Rick T

Well-known member
Apr 28, 2019
109
Houston, TX
The company who plastered the pool came today. He said he thought that if we drain the pool he could treat all the areas and polish the surface and make them go away.
 

Rick T

Well-known member
Apr 28, 2019
109
Houston, TX
My guess was he was going to acid wash it then polish it. Not sure what polish it means. Also wondering if after 18 months if it has reached its final amount it is going to make the white blotches and thus this would fix it or will it continuously keep doing it.
 

Rick T

Well-known member
Apr 28, 2019
109
Houston, TX
PLater company guys came out. put a bunch of muriatic acid in the pool then tied a recirculating pump just below the surface of the water to keep the pool stirred up. ran it for 4 days, adding more acid after day 2. 90% of the white spots cam off.
 

onBalance

TFP Expert
LifeTime Supporter
In The Industry
Jul 25, 2011
1,061
Utah
I am sorry to say, but I would suggest that the plaster surface is now etched, and the white (porous) spotting will return (in some fashion) in time. But I hope that doesn't happen. Fortunately, if this is a smooth quartz finish, the plaster can still be sanded and polished. Of course, that is a more expensive job.
 

Rick T

Well-known member
Apr 28, 2019
109
Houston, TX
I am finding that since the acid wash my Polaris 280 had been picking up a lot of sand-like material. The pool currently is back to original color. Maybe the sand-like material is the white stuff?