
Natural Chemistry Stain Free Extra Strength
Extra Strength Stain Removal for Stubborn Pool Stains
When standard treatments aren’t enough, Natural Chemistry Stain Free Extra Strength delivers professional-grade stain removal that restores pool surfaces quickly and safely. Using a highly concentrated ascorbic acid (Vitamin C) formula, this extra-strength solution is designed to tackle the most stubborn stains caused by iron, copper, and other metals that build up in pool water.
Perfect for vinyl, fiberglass, and plaster pools, this formula works fast to lift brown, green, and black discoloration without damaging delicate finishes. Whether you’re dealing with heavy staining from metal-rich water or recurring spots that keep coming back, Stain Free Extra Strength provides a reliable solution trusted by pool professionals.
Why Choose Stain Free Extra Strength?
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Extra-Strength Formula – More concentrated than standard Stain Free for tougher stains.
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Ascorbic Acid Power – Naturally derived Vitamin C removes stains effectively and safely.
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Surface-Safe Treatment – Won’t harm vinyl liners, fiberglass shells, or plaster finishes.
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Fast Results – Restores pool beauty often within 24 hours of treatment.
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Professional-Grade Quality – A trusted solution from Natural Chemistry’s specialty line.
Benefits for Pool Owners
✅ Removes Deep-Set Stains – Tackles stubborn discoloration from iron, copper, and manganese.
✅ Protects Pool Surfaces – Gentle on finishes while still delivering strong cleaning power.
✅ Improves Water Appearance – Brightens and restores clarity to stained pools.
✅ Works with All Pool Types – Compatible with chlorine and saltwater systems.
✅ Pairs with Preventatives – Use with Metal Free or Stain & Scale products to stop stains from returning.
Product Details
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Brand: Natural Chemistry
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Model: Stain Free Extra Strength
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Size: 1 lb container
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Type: Pool Stain Remover
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Active Ingredient: Concentrated Ascorbic Acid
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Application: For tough metal stains in vinyl, fiberglass, and plaster pools
How to Use
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Balance Water – Lower chlorine level to 1 ppm or less and adjust pH between 7.2–7.6.
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Apply Directly – Broadcast Stain Free Extra Strength over stained areas.
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Brush Lightly – Help dissolve and spread product across surfaces.
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Circulate Water – Run pool pump to distribute treatment.
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Follow with Sequestrant – Add Natural Chemistry Metal Free to prevent stains from reappearing.
For severe or recurring staining, multiple treatments may be required.
FAQs – Stain Free Extra Strength
Q: How is this different from regular Stain Free?
A: The Extra Strength version contains a more concentrated dose of ascorbic acid, making it more effective against tough or persistent stains.
Q: Will this remove calcium or scale?
A: No, Stain Free Extra Strength is specifically for metal-based stains. Use a scale remover like EasyCare Scaletec Plus for calcium deposits.
Q: Is it safe for saltwater pools?
A: Yes, this product is compatible with both chlorine and saltwater systems.
Q: Do I need to vacuum after treatment?
A: In most cases, stains dissolve into the water. Regular filtration and brushing will keep surfaces clean.
Q: How often should I use this?
A: Use as needed for stain removal. Pair with a stain-prevention product to minimize reapplication.