Pool Stain Removal Guide for Georgia: Red Clay, Metal & Organic Stains

Peachy Pools helps homeowners across Cobb, Paulding, and Cherokee counties identify and remove pool stains caused by Georgia's red clay soil, metals in well water, organic debris, and mineral buildup. If you have brown, green, rust, or purple stains on your pool walls or floor, this guide explains what causes each type, how to remove it, and how to prevent stains from coming back.

I am Corey Adams, owner of Peachy Pools, and stain removal is one of the most common service requests I handle in Kennesaw, Marietta, and the surrounding area. Georgia's unique combination of red clay soil, high iron content in groundwater, heavy pollen seasons, and warm humid summers creates staining problems that pool owners in other states rarely deal with. Most pool stains look alarming but are straightforward to treat once you identify the cause.

Types of Pool Stains in Georgia

Every pool stain falls into one of three categories: metal stains, organic stains, or mineral scale. The color of the stain tells you what category it is, and the category determines how to treat it. Using the wrong treatment makes stains worse — acid-washing a metal stain, for example, can spread it across your entire pool surface.

Red Clay Stains: Georgia's Most Common Pool Problem

If you live anywhere in Cobb, Paulding, or Cherokee counties, you know Georgia's red clay. It gets on everything — driveways, shoes, pets, and especially pools. Red clay stains are caused by iron oxide in the soil. When rain washes red clay into your pool, or when swimmers track it in on their feet, the iron binds to your pool surface and creates rust-colored stains that regular brushing will not remove.

Red clay staining is worse after heavy rain events, during construction or landscaping work near the pool, and in pools without proper deck drainage. Homes in Dallas, Hiram, and the Paulding County foothills tend to have the worst red clay exposure because of the terrain and soil composition.

How to Remove Red Clay Stains

Do not use chlorine-based shock to treat red clay stains. Chlorine oxidizes dissolved iron and causes it to precipitate right back onto your pool surfaces, making the staining worse. Keep chlorine levels low (1-2 ppm) during the treatment process and hold off on shocking until after the metal sequestrant has had 48 hours to work.

Metal Stains from Well Water

Many homes in Cherokee and Paulding counties are on well water with naturally high iron, copper, or manganese levels. Every time you add well water to your pool — topping off after evaporation, refilling after a backwash, or adding water after a party — you are introducing metals. Over time, these metals accumulate and stain pool surfaces.

Copper stains are green or teal. Iron stains are brown or rust. Manganese stains are purple or black. If you are on well water in Canton or Woodstock and regularly add water to your pool, you should be using a metal sequestrant as part of your regular maintenance — not just as a treatment after stains appear.

Organic Stains: Leaves, Pollen, and Algae

Georgia's long growing season and heavy tree canopy mean organic staining is a year-round problem. In spring, pine pollen coats everything with a yellow-green film that can stain waterline tile and vinyl liners. In fall, oak and sweetgum leaves sink to the bottom and leave brown tannin stains that look like shadows on the plaster. For more on managing pollen's impact on your pool, see our Pollen Season Pool Maintenance Guide.

Organic stains are the easiest to remove. Chlorine breaks down organic material, so a good shock treatment (calcium hypochlorite at 2 to 3 times the normal dose) will remove most organic stains within 24 to 48 hours. For stubborn tannin stains, place a chlorine tablet directly on the stain and let it sit for 30 minutes — the concentrated chlorine bleaches the tannin.

The Vitamin C Test

Not sure if a stain is metal or organic? Hold a vitamin C tablet against it for 30 seconds. If the stain lightens or disappears, it is a metal stain (ascorbic acid dissolves metal deposits). If nothing happens, it is organic and needs chlorine treatment instead. This test costs about $0.10 and saves you from using the wrong chemical, which can waste money and make the stain harder to remove.

Calcium Scale and Mineral Deposits

White or gray crusty deposits along the waterline or on tile are calcium scale. This happens when your calcium hardness is above 400 ppm and your pH drifts above 7.8 — the calcium comes out of solution and deposits on the first surface it contacts. In Georgia, hard municipal water and summer evaporation both concentrate calcium over time. For a deeper dive into water chemistry balance, see our Complete Pool Water Chemistry Guide.

Calcium scale removal requires either a pumice stone (for plaster and tile only — never use on vinyl or fiberglass), muriatic acid diluted 10:1 with water applied with a scrub pad, or a professional bead blasting service for severe buildup. Prevention is far easier: keep calcium hardness between 200 and 400 ppm and pH between 7.2 and 7.6.

Professional Stain Removal Services

Some stains require professional treatment. If you have tried the vitamin C test and chlorine treatment without success, if stains cover a large area of your pool floor, or if you are not comfortable handling pool chemicals, it is time to call a professional.

Professional stain removal in Cobb, Paulding, and Cherokee counties typically costs $150 to $400 depending on the stain type and severity. An acid wash (draining the pool and applying diluted muriatic acid to the entire surface) costs $400 to $800 and is a last resort for severe, widespread staining — it removes a thin layer of plaster, so it can only be done a limited number of times over a pool's lifetime. For pools in Acworth and Smyrna with ongoing red clay issues, I usually recommend a combination of regular sequestrant treatments and improved deck drainage rather than repeated acid washes.

Stain Prevention for Georgia Pools

If you have pool stains you cannot identify or remove, or if you need help with ongoing stain prevention, call Corey at (770) 802-3997. Peachy Pools provides stain identification, chemical treatment, and preventive maintenance for homeowners throughout Kennesaw, Marietta, Acworth, Vinings, and all of Cobb, Paulding, and Cherokee counties. Free estimates, no contracts.