I have stained stairs; yellow / brownish stains. I think the stars are fiberglass, they feel like plastic.
Cleaning them with Citric Acid turns them to a bright white but I've been doing this at an increasign interval. After cleaning to bright white with Citric Acid the stains usually return within two to three (2-3) weeks.
I sanatize with Tri-Chlor (Doheny's 3 in Chlorine Tabs), and shock with 12.5% Pool Tech. Aqua Mate for all other chems (Job Lot).
I use the Taylor test kit and my levels are all within range or close. Not perfect but decent.
FC: 10.5
PH: 7.3
TA: 90
CH: 650
CY: 80 (Tabs push this high or higher)
My question is what is the cause of this returning stain? Should I use some type of Iron Out or other metal out product?
Cleaning them with Citric Acid turns them to a bright white but I've been doing this at an increasign interval. After cleaning to bright white with Citric Acid the stains usually return within two to three (2-3) weeks.
I sanatize with Tri-Chlor (Doheny's 3 in Chlorine Tabs), and shock with 12.5% Pool Tech. Aqua Mate for all other chems (Job Lot).
I use the Taylor test kit and my levels are all within range or close. Not perfect but decent.
FC: 10.5
PH: 7.3
TA: 90
CH: 650
CY: 80 (Tabs push this high or higher)
My question is what is the cause of this returning stain? Should I use some type of Iron Out or other metal out product?
