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| Customer Reviews | 4.7 out of 5 stars 23,485 | 4.7 out of 5 stars 15,956 | 4.7 out of 5 stars 2,418 | 4.7 out of 5 stars 23 | 4.7 out of 5 stars 125 | 4.1 out of 5 stars 93 | 4.4 out of 5 stars 12 |
| Price | $34.99$34.99 | $34.99$34.99 | $19.99$19.99 | $30.99$30.99 | — | $16.49$16.49 | $18.49$18.49 |
| Purpose | Sanitizing Water | Shocking/Oxidizing Water | Raise Alkalinity Level | Control Phosphates & Organics | Phosphate Reduction | Pre-Shock Treatment | Pre-Shock Treatment |
| Ideal Use Case | Maintain Sanitizer Level | Boost Chlorine Levels | When Alkalinity is Low | Weekly Maintenance | Heavy debris, Rain, or Algae | Green Algae Treatment | Yellow Algae Treatment |
| Water Impact | Maintains Safe Chlorine Level | Rapid Oxidation & Clarity | Stabilizes Water Balance | Maintains Healthy Water | Eliminates Phosphate Load | Clears Green Algae Quickly | Clears Yellow Algae Quickly |
| Application | Floater or Feeder Dispenser | Pre-Dissolve | Apply Directly to Water | Skimmer w/ Pump Running | Skimmer w/ Pump Running | Apply Directly to Water | Apply Directly to Water |
| Typical Results Timeline | Ongoing Weekly Sanitizer | Immediate Oxidizing Boost | 4 - 8 Hours | Weekly Performance | 24 - 48 Hours | ~24 Hours | ~24 Hours |