SpaGuard® Rapid-Dissolve Stain & Scale Tabs – 1.25 lb (SKU 42663BIO) – Hot Tub Things

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SpaGuard® Rapid-Dissolve Stain & Scale Tabs – 1.25 lb Metal-Free Formula
SpaGuard® Rapid-Dissolve Stain & Scale Tabs – 1.25 lb Metal-Free Formula

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SpaGuard® Rapid-Dissolve Stain & Scale Tabs – 1.25 lb Metal-Free Formula

Type: Clarifier

SKU: 42663BIO

Barcode: 17541665667

$30.99
Shipping calculated at checkout.

SpaGuard® Rapid-Dissolve Stain & Scale Tabs (1.25 lb, SKU 42663BIO) are high-efficiency, effervescent tablets formulated for hot tubs and spas to help prevent metal stains and calcium scale buildup. With just one tablet per ~300 gallons each week, a single bottle treats an average spa for up to 12 weeks. The metal-free formula is safe for spa surfaces and equipment, simplifying maintenance while helping preserve clarity and smooth finishing.

  • The SpaGuard® Rapid-Dissolve Stain & Scale Tabs (SKU 42663BIO) offer effervescent, fast-dissolving tablets designed specifically for spas and hot tubs to combat metal staining and calcium scale formation. 

  • Each tab delivers active stain- and scale-inhibiting agents weekly so that one bottle can treat an average-sized spa for approximately 12 weeks. 

  • Designed for spa and swim-spa use, one 1″ tablet per ~300 gallons of water is recommended weekly to maintain surface and equipment protection. 

  • The metal-free formula helps protect finishes and circulation equipment from iron, copper and manganese stains, as well as calcium scale buildup—providing an added layer of maintenance ease.

  • Compatible with typical spa sanitizing systems; maintain proper water balance (pH, alkalinity, calcium hardness) for optimal performance of the tabs.