HTH spa™ Metal Out

Hot Tub Metal Remover for Stain and Scale

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HTH spa™ Metal Out

Hot Tub Metal Remover for Stain and Scale

HTH Spa™ Metal Out is a highly effective metal out solution designed to prevent stains, discoloration, and scale in your spa or hot tub water. This concentrated metal out pool treatment targets iron, copper, and other metals often found in spa fill water, removing them before they can cause cloudy water, unsightly marks, or damage to spa surfaces and equipment. 

  • Use at start-up and with every refill to protect against corrosion, staining, and scale.
  • Each 16 oz bottle treats up to 500 gallons and is fully compatible with chlorine and bromine sanitizers.
  • For those who also use products like pool metal remover or hot tub chemicals, HTH Spa Metal Out is a seamless addition to your complete spa maintenance regimen.

Product Benefits

Prevents Stain & Scale

Advanced metal out formula protects spa and hot tub water from staining, scale, and discoloration

Powerful Metal Remover

Targets and removes iron, copper, and other metals for clear, fresh water—ideal as a metal out pool treatment

Long-Lasting Protection

Use with every refill for ongoing defense against scale and corrosion; works alongside other metal out pool chemicals and spa treatments

Easy, Effective Dosing

Each 16 oz bottle treats up to 500 gallons; simply run filter for 30 minutes after dosing

How to Use

How to Use

This product is a concentrated formula designed to prevent the buildup of iron and other metals in spa and hot tub water. It works by sequestering metals to help prevent staining on spa surfaces.

This product is intended for use each time you refill your spa.

Startup Treatment

Use this product during the start‑up steps of your spa care routine.

One bottle treats spas containing up to 500 gallons of water.

With the circulation system running, pour the entire bottle evenly into the water around the edge of the spa.

After Application

Once the product has been added, run the filter for at least 30 minutes.

Do not shock the spa for a minimum of 1 hour after application.

Ongoing Spa Care

Use this product as part of your regular spa maintenance routine to help prevent metal buildup when refilling.

Compatible with chlorine, bromine, mineral, ozone, and biguanide sanitizing systems.

Ingredients

Ingredients

Contains etidronic acid.

Safety, Storage, and Disposal

Safety, Storage & Label Guidance

Use this product only as directed. Avoid contact with eyes and skin.

Wash hands thoroughly after handling.

Do not mix this product with other chemicals.

Store in the original, tightly closed container in a cool, dry, well‑ventilated area.

For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.

Reviews

 

Quick Spa Tips

  • Always read product label directions and use only as directed

  • Always add chemicals to spa water, never the other way around

  • Never add chemicals to spa water when people are in the spa

  • Warning symbol with a triangle and exclamation mark on a blue background

    Never mix products together

  • Always store spa products in a cool, dry location and away from direct sunlight

  • Outline of a pair of gloves on a navy blue background

    Always wear proper safety equipment when handling chemicals