Hot Tub Things Metal Out – 16 fl oz Spa & Hot Tub Stain & Scale Preventer

Q: Why do I need Metal Out?

A: It prevents metal staining and scale buildup from minerals like iron, copper, and calcium—even common in fresh fill water.

Q: When should I use it?

A: Add once during refill or top-off; increase dose if you notice discoloration or scale.

Q: Will it harm my sanitizer or spa surfaces?

A: No—formulated for all sanitizers (chlorine, bromine, ozone, salt) and safe on acrylic, vinyl, and heaters.

Q: How much do I add for heavy metal issues?

A: Use 24 fl oz instead of 16 fl oz with pump and filter running.

Add 16 fl oz to clean spa water during fill with pump running; use 24 fl oz for heavy metal clearance.

Let the system circulate for 2 full cycles (approx. 1–2 hours).

Clean or backwash filter after use to remove suspended particles.

Use each refill or as needed based on source water quality.