SpaGuard® Rapid-Dissolve Alkalinity Increaser Tabs – 1.25 lb – Hot Tub Things

Free Shipping $100+ | Genuine Spa Brand Products

Why Choose Hot Tub Things?

Authentic & Genuine Products: Never knockoffs or expired inventory

Competitive Pricing: Best value for premium spa care products

Expert Customer Support: Our team knows hot tubs inside and out

Great Everyday Value: Strong fit and quality without OEM pricing

Satisfaction Guaranteed: Thousands of happy spa owners nationwide

Fast Free Shipping: Free shipping on orders $100+ (see terms)

Hurry up, only 5 items left in stock.

SpaGuard® Rapid-Dissolve Alkalinity Increaser Tabs – 1.25 lb

Type: Balancer

SKU: 42661BIO

Barcode: 17541665629

$15.99
Shipping calculated at checkout.

Maintain perfectly balanced spa water with SpaGuard® Rapid-Dissolve Alkalinity Increaser Tabs (1.25 lb). These specially formulated tablets quickly raise total alkalinity—an essential measure for stabilizing pH, preserving spa equipment, and enhancing bather comfort. The effervescent design simplifies treatment: drop the required number of tablets (2 per 250 gallons for a ~30 ppm increase) into the spa while jets are running and let the mixture disperse. With this product you’ll avoid pH swings that lead to cloudy water, skin or eye irritation, and equipment corrosion. Suitable for all types of sanitizing systems—chlorine, bromine, saltwater or mineral—you can integrate this into your existing routine with ease. The generous 1.25 lb size gives you multiple doses for the season, making it a practical choice for spa owners who prioritize water stability and carefree maintenance.

Pickup available at Burlingame Usually ready in 24 hours

  • The SpaGuard® Rapid-Dissolve Alkalinity Increaser Tabs offer spa owners a fast, convenient way to raise total alkalinity and stabilize pH in hot tubs and swim spas.

  • These effervescing tabs are designed for easy dosing: for example, 2 tabs per 250 gallons of water raise alkalinity by approximately 30 ppm. 

  • Proper total alkalinity helps prevent “pH bounce,” which can cause corrosion of equipment, cloudy water, and skin or eye irritation.

  • Compatible with all standard sanitizing systems including chlorine, bromine, salt and mineral setups, making it flexible for many spa configurations.

  • The 1.25 lb package size is ideal for multiple treatments across a full season in most residential spas.

  • Manufactured by SpaGuard®, a trusted name in spa water care, ensuring consistent quality and ease of use.