Bosh Chemical Vanish Pool & Spa Stain Remover — 2-Pack (4 lb) Citrus-Based Rust and Metal Stain Treatment

Bosh Chemical Vanish Pool & Spa Stain Remover is a citrus-derived treatment that dissolves rust and common underwater stains on vinyl, fiberglass, and metal surfaces without harsh scrubbing.

Designed for homeowners and pool technicians who want a safer alternative to strong acids, this two-pack (4 lbs total) uses natural citrus by-products to lift discoloration from pool liners, spa shells, and other submerged surfaces. It is formulated to be pool-safe when used as directed and is effective against metal-origin stains caused by heaters, plumbing, and other equipment. The product simplifies stain removal so you spend less time treating problem areas and more time enjoying the water.

How quickly will stains disappear after treatment?

Results depend on stain age and severity: light deposits may fade within hours, while heavier or older stains often need repeated applications or a mild brushing. The formula works chemically to loosen bonds between the stain and surface, accelerating visible removal compared with passive soaking.

• Treats localized stains quickly when poured directly around the problem area.
• Light stains: visible improvement in a few hours.
• Stubborn or set-in stains: repeat application and gentle brushing speeds results.
• Safe for ongoing maintenance to prevent stain buildup.

Is this safe for vinyl, fiberglass, and metal surfaces?

Yes—Bosh Chemical Vanish is formulated for use on common pool and spa materials when applied according to the directions. Because it is made from citrus by-products, it avoids some of the harshness of stronger acids while still dissolving metal and rust stains.

• Compatible with vinyl liners and fiberglass shells when used as directed.
• Effective at dissolving rust and iron staining from metal components.
• Non-corrosive compared to many traditional acid treatments.
• Recommended to spot-test unclear surfaces before full application.

How do I apply Vanish Pool & Spa Stain Remover safely and effectively?

Application is straightforward: pour the product directly around the stained area and allow the solution to act. For tougher stains, a light brushing after application helps lift residues; always follow label instructions and pool chemical safety practices.

• Pour directly around the stained zone—no elaborate mixing required.
• Allow time for the formula to penetrate and loosen the stain.
• Use a soft brush for heavy deposits; avoid aggressive scrubbing on delicate liners.
• Rinse or filter water as directed after treatment steps are complete.

How much pool water can this two-pack treat?

The two 2 lb containers provide enough product to treat multiple spot stains across medium and large pools. The total quantity is designed to address several problem areas or to be used as periodic maintenance for high-traffic pools.

• Combined pack treats stains across larger pools without needing immediate reorders.
• Ideal for spot treatments rather than full-volume shocking.
• Concentrated action means a little product goes a long way on localized stains.
• Keep extra on hand for recurring metal-origin staining from equipment.

Who is this for: Bosh Chemical Vanish Pool & Spa Stain Remover is aimed at homeowners, pool service professionals, and spa owners who prefer a gentler, citrus-based solution to tackle rust and discoloration on vinyl, fiberglass, and metallic surfaces. If you want a product that simplifies stain removal without resorting to harsh acids and that treats multiple problem areas from a single two-pack, this formula offers a practical, effective option when used following safety guidance.