Solve Chlorine lock for good Only HTH™ fast-dissolving shock with Cal Hypo clarifies and rids water of contaminants without using any CYA (cyanuric acid). That means it won't overstabilize or cause chlorine lock—ever.

Dive into the world of HTH™ pool and spa chemicals, designed to keep your pool and spa sparkling clean. Browse HTH™ and find a retail store near you today!

• HTH 2-in-1 chlorinating formula clarifies pool water, kills algae and bacteria • Sanitizes and protects pool water • Place tablets in skimmer, floater or feeder for simple DIY pool care

This 2-in-1 liquid chlorine shock and sanitizer that can be added to your pool water to control bacteria and algae without overstabilizing your water. Shop HTH™ today!

2022年1月26日 · The Cal Hypo based formula in HTH Chlorine Granules Ultra provides chlorination without adding extra CYA for beautifully clear water all season.

Enjoy the ultimate DIY pool care convenience with HTH 3-In Chlorine Tabs Ultra. Designed for use in your floater, feeder and skimmer, this product kills algae and bacteria while softening, clarifying and guarding surfaces from stain and scale for a clean, clear pool.

This granular chlorine sanitizes, controls algae, clarifies, and softens your pool water. This all in one treatment saves time and energy. Shop HTH™ now!

Contains one 18-pound container of HTH® Ultimate Mineral Brilliance Chlorinating Granules for swimming pools. Multi-functional 7-in-1 action: kills bacteria and algae; crystal clear results in 24 hours; helps prevent scale formation; turns blue to show it’s working; softens water; provides filter aid; fast dissolving