Hot Tub Things® Metal Out (16 fl oz) – Spa & Hot Tub Stain & Scale Preventer
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Key Features & Benefits
Prevents Staining & Discoloration
Helps eliminate rust, copper, and other mineral stains before they can form on spa surfaces. Keeps your shell, fittings, and waterline looking clean and well-maintained.
Scale Prevention for Equipment Protection
Engineered for seamless compatibility with original mounting points for secure placement.Stops calcium and mineral scale from building up on heaters, jets, and plumbing. Reduces wear on internal components and helps maintain efficient spa operation.
Treats Up to 500 Gallons
One 16 oz bottle provides multiple treatments for standard-sized spas. Concentrated formula delivers long-lasting value with consistent performance.
Universal Sanitizer Compatibility
Works seamlessly with chlorine, bromine, and saltwater systems without interfering with water chemistry. Designed to integrate easily into any spa maintenance routine.
Simple, No-Mix Application
Just add directly to your spa water—no complicated measuring or mixing required. Quick and easy dosing makes routine maintenance hassle-free.
Protects Equipment & Extends Lifespan
Prevents mineral deposits that can damage pumps, heaters, and plumbing components. Regular use helps extend the life of your spa system while maintaining peak performance.
Product Overview
Hot Tub Things® Metal Out is a concentrated stain and scale prevention treatment specifically formulated for hot tubs and spas. This chelating agent binds to dissolved metals in your water—including iron, copper, manganese, and calcium—preventing them from oxidizing and staining your spa surfaces, equipment, and water.
Whether you're filling your spa with well water high in minerals or dealing with metal contamination from source water, Metal Out provides continuous protection against the most common causes of spa staining and scale formation.
Frequently Asked Questions
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Add 2-4 oz per 500 gallons when initially filling your spa. For ongoing maintenance, add 2 oz monthly. If you have well water or notice staining, use weekly until water clears.
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Yes! Works with all sanitizer types including chlorine, bromine, saltwater systems, and mineral sanitizers without interference.
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Metal Out prevents stains. For existing stains, use with Hot Tub Things® Stain & Scale Remover first, then maintain with Metal Out.
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While formulated for spas, it can be used in small pools. Multiple bottles needed for larger pools.
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Look for green, brown, or rust stains on surfaces, cloudy water after filling, or if you use well water. Metal test strips can confirm presence of iron and copper.
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Yes, safe for all spa surfaces including acrylic, fiberglass, vinyl, and plaster.
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