Applied Biochemists Staintrine – Pool Stain Preventer & Remover, 1 Qt

Prevent and Remove Stubborn Pool Stains with Ease

Keep your pool surfaces looking new with Applied Biochemists Staintrine, a professional-grade stain preventer and remover designed to eliminate and control metal and mineral discoloration. This 1-quart liquid treatment dissolves and sequesters iron, copper, manganese, and other metals that cause unsightly stains and water discoloration.

Perfect for use in both residential and commercial pools, Staintrine works with your existing sanitizer to protect pool finishes, restore clarity, and maintain a brilliant, uniform surface appearance—without draining or scrubbing.

Advanced Metal & Stain Control Technology

Applied Biochemists Staintrine uses a phosphonic acid-based sequestrant that binds with dissolved metals, keeping them in solution so they can be filtered out safely. This prevents metals from oxidizing and forming brown, green, or black stains on plaster, fiberglass, or vinyl pool surfaces.

Its non-acidic, concentrated formula not only prevents new stains but also lightens and removes existing discoloration caused by metals and minerals.

Key Benefits

• Prevents and removes pool stains from iron, copper, and manganese.

• Restores and brightens discolored surfaces.

• Prevents water discoloration after shocking or pH adjustments.

• Compatible with chlorine, bromine, and saltwater systems.

• Safe for all pool finishes—plaster, vinyl, and fiberglass.

• Non-foaming and easy to apply.

With regular use, Staintrine keeps your pool water clear and your surfaces spotless season after season.

Eliminate Stains Before They Start

Even trace metals can cause surface staining, especially in hard water areas or when filling from well sources. These contaminants react with sanitizers and oxidizers, leaving behind unsightly marks or greenish tinting.

Applied Biochemists Staintrine prevents this by capturing metal ions before they can attach to pool surfaces. The result?

• No brown or rust-colored spots from iron.

• No green or blue stains from copper.

• No black blotches from manganese.

• No cloudy water during shock treatments.

Routine use after shocking or water replacement keeps your pool protected against future discoloration.

Effective Stain Removal Without Draining

Unlike abrasive stain removers or acid washes that can damage pool finishes, Staintrine lifts stains chemically—gently dissolving and dispersing discoloration at the molecular level. It’s the safest and most efficient way to restore your pool’s appearance without the cost or risk of draining.

For Existing Stains

1. Lower chlorine to below 1 ppm before application.

2. Add 16 oz per 10,000 gallons of pool water.

3. Brush stained areas lightly to loosen buildup.

4. Allow system to circulate for 24–48 hours.

Visible improvement often occurs within one day. For severe cases, a second treatment may be applied after a week.

For Preventative Maintenance

Add 4 oz per 10,000 gallons weekly to maintain stain protection and keep metals in suspension.

Safe for All Pool Types

Applied Biochemists Staintrine is compatible with all standard pool systems and surfaces, including:

• Plaster and concrete pools

• Vinyl-lined pools

• Fiberglass and painted finishes

• Saltwater and chlorine-based sanitizing systems

The formula is non-corrosive and non-staining, ensuring it protects rather than harms your pool equipment and plumbing.

Prevents Stains During Start-Up or Refill

Metals are most likely to cause staining when new water is added to your pool—especially after winterization or draining. Using Staintrine during refill neutralizes these metals immediately, preventing new discoloration before it can start.

Pro tip: Always add Staintrine before shocking or adding chlorine when introducing fresh water to your pool.

Compatible with Shock and Sanitizers

Unlike metal removers that interfere with chlorine, Staintrine works safely alongside sanitizers. Just ensure chlorine levels are below 5 ppm before dosing to avoid rapid oxidation of metals. After treatment, normal sanitizer levels can be restored.

Protects Equipment and Plumbing

Metal buildup doesn’t only stain surfaces—it can also accumulate inside heaters, filters, and salt cells, reducing performance and lifespan. Using Staintrine helps keep plumbing and equipment free of scale, metal deposits, and staining, improving circulation efficiency and water clarity.

Product Specifications

Maintenance Tips for Long-Term Protection

• Add Staintrine each time you refill or top off pool water.

• Maintain balanced pH (7.2–7.6) and alkalinity (80–120 ppm).

• Avoid shocking the pool within 24 hours of treatment.

• Brush and circulate water to enhance stain removal.

Consistent use ensures clean, bright, and even pool surfaces all season.

Why Choose Applied Biochemists Staintrine

For over 60 years, Applied Biochemists® has set the standard for pool water chemistry and maintenance. Their Staintrine formula reflects decades of research into metal sequestration, stain prevention, and water clarity science.

Unlike generic alternatives, Staintrine is formulated for long-term metal control, helping pool professionals and homeowners achieve lasting results with fewer applications.

The Applied Biochemists Difference

• Industry-trusted formulations since 1956

• Backed by EPA and NSF safety compliance

• Used by service professionals nationwide

• Proven safe for residential and commercial applications

When appearance and protection matter, Staintrine is the industry’s preferred solution for lasting stain control.

Buy with Confidence from Benchmark Pool Supply

At Benchmark Pool Supply, we carry authentic Applied Biochemists water treatment products trusted by pool professionals across the country. The Staintrine 1 Qt Pool Stain Preventer & Remover provides unbeatable stain protection, fast results, and safe compatibility with all sanitizing systems.

We offer fast shipping, expert support, and verified genuine products—so you can keep your pool looking crystal-clear and professionally maintained year-round.

---

Frequently Asked Questions

What does Applied Biochemists Staintrine do?

Staintrine prevents and removes stains caused by iron, copper, and manganese by keeping metals in suspension so they can be filtered out safely.

Can I use Staintrine with chlorine or saltwater pools?

Yes. It’s compatible with chlorine, bromine, and salt systems when used according to label directions.

How often should I use Staintrine?

For prevention, add 4 oz per 10,000 gallons weekly. For active stains, add 16 oz per 10,000 gallons and circulate for 24–48 hours.

Will this product remove existing stains?

Yes. Staintrine lightens and removes most metal-based stains on vinyl, plaster, and fiberglass surfaces without draining or acid washing.

Should I use it before or after shocking my pool?

Always use Staintrine before shocking to prevent metal oxidation and discoloration. Wait 24 hours after treatment before shocking the pool.